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The 10 Smallest Portable Air Conditioners For 2021: Top Picks and Buying Guide

Looking for a small portable AC to cool a room? 

You’ve come to the right place.

Portable air conditioners are great for those who don’t have a central AC system or want to save on energy bills by only cooling the room in use.

A portable AC uses less energy than a central room air conditioner and is more versatile since you can move it from room to room.

But the term ‘portable AC’ can be misleading.

Some portable ACs weigh 80 lbs or more and require semi-permanent ventilation - making it next to impossible to move, once installed.

But let’s be honest: for most homes and most rooms, a small portable air conditioner is all you need.

Even better, smaller portable AC units cost a lot less, work in more rooms, and are truly portable.

Why Smaller is (Usually) Better

The bigger a portable conditioner is, the more powerful it is, meaning it’ll cool a space faster.

But a large portable AC is not always the best choice for cooling a room. If it is too big (in terms of BTUs) for the room you are using it in, it can actually make the environment more uncomfortable.

According to the Department of Energy, a too-large AC is inefficient at both cooling and dehumidification. It’ll leave the room feeling clammy and uncomfortable. 

A smaller AC unit that’s matched to the room size cools and dehumidifies more effectively and operates using less power.

In addition to the energy-saving and better cooling performance, a small AC takes up less space and is easier to move from room to room.

Choosing the Best Small Portable AC for Your Home 

Pay attention to the BTUs of the portable AC you plan to buy. Portable air conditioners typically start at 5,500 BTUs. This is ideal for small rooms of up to 150 square feet.

Most homes will find an 8,000-BTU portable AC to be the best. It can cool a room of up to 350 sq. Ft.

Of course, a small portable AC is not always the best choice. If you have fairly large rooms at home, you don’t want to get an underpowered AC. It’ll waste as much power as an oversized one as it attempts to cool the entire room.

So, depending on your room size, you may need to go up to 10,000 BTUs or 14,000 BTUs.

For a complete AC sizing guide, see the sizing table below the reviews.

What’s In This Buying Guide

In this guide, we'll review the best small portable air conditioners suitable for use in rooms less than 600 square feet in size.

After the reviews, we'll dive into the practical aspects of portable AC installation, maintenance, and ventilation.

Best Small Portable AC Units

We’ve researched dozens of small portable air conditioners and read numerous customer reviews. Below is the ten that we believe are the best for most homes.

Our top picks range from tiny units designed to cool spaces of less than 200 sq. Ft. to those designed for large rooms of 600 sq. Ft.

Use the above table of contents to jump to a specific air conditioner or keep reading to go through all the reviews.

Honeywell MO08CESWK AC
  • Honeywell MO08CESWK

  • Our top overall pick
  • BTUs:

  • Max Cooling Area
    (sq. ft.):


  • Price:


  • Best for small rooms
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  • Max Cooling Area
    (sq. ft.):


  • Price:

Honeywell HL12CESWB ac
  • Honeywell HL12CESWB

  • Best for large rooms
  • BTUs:

  • Max Cooling Area
    (sq. ft.):


  • Price:

Evapolar evaCHILL
  • Evapolar evaCHILL Swamp Cooler

  • Best for desk or bedside
  • BTUs:

  • Max Cooling Area
    (sq. ft.):


  • Price:

Luma Comfort
  • Luma Comfort EC110S

  • Best portable swamp cooler
  • BTUs:

  • Max Cooling Area
    (sq. ft.):


  • Price:

Whynter Elite ARC-122DHP
  • Whynter Elite ARC-122DHP

  • Best dual hose
  • BTUs:

  • Max Cooling Area
    (sq. ft.):


  • Price:

Global Air Portable AC
  • Global Air Portable AC

  • Best value
  • BTUs:

  • Max Cooling Area
    (sq. ft.):


  • Price:

hOmeLabs Portable AC
  • hOmeLabs Portable AC

  • Best for dehumidification
  • BTUs:

  • Max Cooling Area
    (sq. ft.):


  • Price:

EdgeStar AP8000W
  • EdgeStar AP8000W

  • Best space saver
  • BTUs:

  • Max Cooling Area
    (sq. ft.):


  • Price:

EdgeStar AP12000HS
  • EdgeStar AP12000HS

  • Best for year-round use
  • BTUs:

  • Max Cooling Area
    (sq. ft.):


  • Price:

Honeywell MO08CESWK

The Honeywell MO08CESWK is a reliable, compact portable ACs that is perfect for medium size rooms of up to 350 square feet.

The integrated dehumidifier keeps the room feeling comfortable, and you can set the temperature anywhere between 61F and 89F.

The full-function remote control makes it easy to adjust the AC’s settings from the comfort of your couch.


  • Auto-evaporation – makes maintenance easier.
  • Powerful built-in dehumidifier.
  • Programmable timer to save energy.
  • It comes with remote control.
  • Smooth gliding wheels for easy portability.


  • Only two fan speed options (Most portable ACs have at least three).
  • Delicate vent hose – be careful when handling it.
  • Some customers report occasional rattles.

Our Review


The MO08CESWK is rated at 8,000 BTUs. It works best in a medium size room between 250 and 350 square feet.

If you have a slightly bigger room (up to 450 square feet), there is a 10,000 version, the Honeywell MO10CESWK, that you can select from the same Amazon product page.

You can cool the room to between 61F and 89F. You can choose how fast the AC cools the room by selecting from two fan speed settings.

The lower fan speed works slower but is quieter. It’s perfect for cool days and night time use.

The higher fan speed is slightly noisier but cools faster. It’s great for air conditioning during hot summer days.


Like most portable ACs, the Honeywell MO08CESWK comes with a built-in dehumidifier capable of removing up to 44 pints of moisture from the air in a day.

The dehumidifier is great for hot and humid days when the air feels clammy. The unit will both cool the room while also removing excess moisture.


The MO08CESWK portable AC uses a self-evaporative system. This means it exhaust water vapor along with hot air.

In most places during normal use, you don’t have to set up the drainage. The unit doesn’t come with a drain hose.

However, if you plan to use the dehumidifier for a prolonged period or if you live in a high-humidity area, you may have to set up the drainage to get rid of excess condensation.


The Honeywell MO08CESWK comes with everything you need to set up window ventilation.

This includes an exhaust pipe that you can extend between 12” and 47” and an adjustable bracket(19.7” to 47.2”) that you can fit on both vertical and horizontal windows.

Remote Control or Soft Touch Control Panel – Whichever You Want
small air conditioning units

There are two ways to adjust various settings.

If you are feeling sufficiently agile, you can walk to the AC and use the soft-touch control panel at the top.

There are buttons for on/off, fan control, timer control, and mode selection. A small display indicates the set temperature.

There are also indicators to show the current mode, if the timer is on and whether the unit is in standby mode.

If you don’t want to keep standing up every time you wish to adjust the temperature, use the included remote control.

It has all the functions on the control panel.

Easy Portability 
small portable ac

At 43lbs, it’s easy to move the Honeywell MO08CESWK between rooms. Smooth-gliding wheels make it easy to push it along the floor.

If you need to carry it up to the stairs, one or two people can easily lift it.

Quiet Operation 

At the highest fan setting, the Honeywell MO08CESWK produces about 53 decibels. You’ll most likely only notice the fan noise when sleeping and even then, it’s not loud enough to be intrusive.

The AC achieves this by using dual motor technology.

Other Features

Washable dual filters: These filter out dust, pet hair, dander, and other allergens to keep your indoor air clean and healthy.

Filter change alert: An indicator light will come on when the filter needs cleaning.

On/off timer: A 24-hour timer allows you to configure the AC to turn on or off automatically after a certain number of hours. The timer is handy when you go to sleep at night and don’t want to wake up cold or when you want to come home to a cool living room.


Limited fan speed settings: Most portable air conditioners, even the smaller ones, provide at least two fan speed options. A third quieter setting would have been great for night time use.

Delicate window kit: The AC unit itself is sturdily built but the window kit, specifically the hose and the connectors, feels a bit flimsy. You have to be careful when taking the hose down as some plastic parts can break. If you move the AC a lot from room to room, you’ll probably need a replacement window kit after some time.

The hose is not insulated: Some of the heat going out through the exhaust hose can find its way back into the room because the house is not insulated. On hot days or in warm rooms (such as a gaming room), it might take longer to reach your target temperature.


Power: 8,000 BTUs

Room size: 350 sq. Ft.

Weight: 43lbs

Dimensions: 13.5W x 14.6D x 27.7H inches

Noise level: Approx. 53 decibels at the highest setting

Dehumidification capacity: 44 pints/day

Best for Small Rooms (less than 150 sq. ft.):

BLACK + DECKER BPACT08WT 8,000 BTU Portable Air Conditioner


Most people worry about buying a portable AC that’s not powerful enough for the room. But it’s just as easy to purchase one that’s too big, especially if you are planning to use it in a small room.

If you want to cool a room less than 150 square feet in size, we recommend this 8,000 BTU BLACK + DECKER unit.

It’s powerful enough to cool the room fast and keep it cool in the hottest weather but not too powerful that it becomes inefficient.

And it comes with a window kit that’s easy to set up and remote control, so you don’t have to get up the couch to change settings.


  • Four fan speed settings – allow you to select different power and noise levels.
  • Built-in dehumidifier.
  • Auto-evaporation.
  • Remote control with timer and sleep mode.


  • Loud when the fan is on the highest setting.
  • The uninsulated vent hose leaks some of the exhaust heat back into the room.

Our Review

BLACK DECKER sizing guide

The BLACK + DECKER BPACT08WT portable AC is rated at 8,000 BTUs, which feels like it should be able to cool a room larger than the 100-150 sq. Ft. The manufacturer recommends.

But, perhaps because of some design feature, Black + Decker recommends it for small rooms only.

The upside of having more BTUs is that it cools the room fast, faster than most other portable ACs. This is especially noticeable on hot days. You’ll feel the difference in just a few minutes after switching it on.

Not only does it cool fast, but it also cools evenly. This is because air moves in a vertical motion as it comes out of the vents.

So instead of cooling only one side of the room, it is spread out everywhere.

Four Fan Speed Options 

You can select from four fan speed setting.

High: Fan spins fastest to distribute more cooling air and lower the room temperature faster. The AC gets somewhat noisy at this setting.

Med: Balances between performance and noise level. This setting is ideal for maintaining the room at a certain temperature.

Low: The slowest fan speed. Ideal for colder days or at night when you want to reduce the noise level.

Auto: The AC will automatically select the best fan speed to achieve the set temperature. For convenience, leave it in this mode.


This is a 3-in-1 portable air conditioner: cooling, fan-only, and dehumidification.

The built-in dehumidifier reduces moisture in the air though Black + Decker doesn’t specify its dehumidification capacity (the amount of moisture it can extract from the air per day).


When it extracts excess moisture from the air, it has to take it somewhere. In some portable ACs, you have to set up a drainage system to collect the water.

You don’t need to do that with the BLACK + DECKER BPACT08WT. It has an auto-evaporation feature.

It exhausts hot air from the room along with moisture.

However, on particularly humid days or if you turn on the dehumidification feature for a prolonged period, the moisture may be too much for the AC to auto-evaporate.

You’ll need to drain the AC occasionally to remove excess condensation. The control panel will alert you when the internal reservoir fills up.

But in most cases, the auto-evaporation feature is enough, saving you the trouble of connecting a drain hose or using a bucket.

Window Kit 

The BLACK + DECKER BPACT08WT comes with a complete window kit that includes a hose (max length – 4’11”), inlet and outlet adapters for the hose and an adjustable window bracket.

The window kit works with both vertical and horizontal slider windows. You can also install it to vent through a sliding door.

The window kit is super easy to install. You don’t need to screw anything.

Just fit the bracket into the window and close the window. That should hold it tight in place.

If you need to use the AC in another room, it’s easy to take it down.

Remote Control 

You don’t have to stand up every time you want to change a setting. The included remote control has all the functions available in the main control panel.

It even has a small display showing the target temperature.


The BLACK + DECKER BPACT08WT is slightly heavier than other compact portable ACs. But at 52.9lbs in weight, it’s still relatively easy to move about.

Caster wheels at the bottom help a lot when you are moving the unit to another room.

Other Features 

24hr timer: You can set the AC to come on or turn off after a certain number of hours. If you want it to turn off automatically after you sleep or turn it on just before you get home from work, it’s easy. You can set the timer using the remote control or the main control panel.

Slide-out filter: The filter is located at the back where the intake air vents are also. You can easily slide it out, wash it, and reuse it repeatedly.

Sleep mode: Turn on this mode when you go to sleep. The AC will lower the temperature by one degree in the first hour and then another one degree in the second hour before maintaining the final temperature through the night. A cooler bedroom helps you fall asleep quicker and sleep better.

Changeable temperature units: Just in case Fahrenheit is not your thing, and you can change the temperature display units to Celsius.


Loud: At the highest setting, the AC is loud – about 75 decibels. That’s as loud as some window AC units. But at least you can reduce fan speed though at the expense of cooling power.

Always-on display lights: The blue display lights can be annoying at night. There is no way to turn them off without switching off the AC. They should dim or turn off when you activate sleep mode.

No insulation: On hot days, the exhaust hose can become a sort of a room heater — some of the heat going outside escapes through the hose back into the room.


Power: 8,000 BTUs

Room size: 150 sq. Ft.

Weight: 52.9lbs

Dimensions: 16.5 x 11.5 x 26 inches

Noise level: Approx. 75decibels at the highest setting

Dehumidification capacity: Not specified

small portable ac

This Honeywell portable AC cools rooms between 450 and 500 square feet, making it a great choice for open concept living areas, large bedrooms, and other large spaces.

It is a bit heavy compared to other compact portable ACs, but smooth gliding wheels make it a breeze to move when needed.


  • Ideal for larger rooms.
  • Auto-evaporation.
  • Thermal overload protection.
  • 3 fan speeds and timer.
  • Energy-saving sleep mode.
  • Quieter than most portable ACs.


  • It’s large and heavy – reduced portability.
  • Pricey.

Our Review


With 12,000 BTUs, it doesn’t take long for the Honeywell HL12CESWB to cool down a large room.

To ensure fast and even air conditioning, the AC produces cool air in a vertical motion.

You can vary cooling power by adjusting the fan speed. Three-speed options are ranging from a quiet low that’s perfect for night time to a slightly noisier high that works great for hot days.

Honeywell dehumidification

This is a 3-in-1 air conditioner. In addition to the AC mode, there’s a fan-only mode and a dehumidifier.

The dehumidifier is quite powerful; it can remove up to 86 pints or around 40.6 liters of moisture from the air in a day.

That's a lot more water than most other small portable air conditioners, meaning it quickly dehumidifies a large room.


There’s no need to set up a drain line or use a bucket. The Honeywell HL12CESWB automatically removes moisture along with the hot air.

Only in areas of high humidity will you need to empty the reservoir.

If you plan to leave the dehumidifier on for long, connect a drain line for continuous draining.

Window Kit 

An extendable hose (max 4 ft) and an adjustable window bracket are included along with the AC unit.

Setting up the window kit is pretty straightforward. You can use it with horizontal or vertical windows. You can also set it up to hot exhaust air out a sliding door.

If you need to use the AC in another room, it takes just a few minutes to take down the window kit and set it up elsewhere.

Dual Filters

The AC uses two filters to trap pet hair, dander, and dust. This ensures you are breathing in allergen-free air.

The filters are washable, so no need to buy replacements every few months.

Multi-function Remote Control 

The remote control lets you access all functions on the main control panel from the comfort of your couch.

You can select your preferred temperature, adjust fan speed, or select a specific mode.

The remote control has its digital display.

Portable ac

As I mentioned, the Honeywell HL12CESWB is a bit heavy. But unless you are taking it upstairs, portability is not a big problem.

Caster wheels at the bottom glide easily across the floor, making it easy to move the unit from room to room.

Other Features 

Sleep mode: In sleep mode, the AC automatically adjusts the temperature to save energy and help you sleep more comfortably.

24hr timer: You can easily set the AC to come on or switch off automatically after a set number of hours.


A bit heavy: If you need to move it up the stairs, you’ll need to pairs of hands to lift and carry it.

Remote control not backlit: In a dark room, you can’t see the display or the buttons.
You will have to turn on a light if you want to adjust the temperature at midnight.


Power: 12,000 BTUs

Room size: 450-550 sq. Ft.

Weight: 78.3lbs

Dimensions: 35 x 20.5 x 18.3 inches

Noise level: 49-52 decibels

Dehumidification capacity: 86 pints/day

Evapolar evaCHILL

If you are looking for a personal cooler that’s just big enough for your desk or bedside, we recommend the Evapolar evaCHILL personal AC.

If you are hoping to cool down an entire room, even if it’s a small room, this won’t work.

It’s meant for personal cooling spaces up to 45 square feet. You are supposed to place it right in front of you on the desk or next to you on the side table of the bed.

Because the evaCHILL cools by humidification, it’s best for drier climates.


  • Works great as a bedside or desk personal cooler.
  • Cools and humidifies.
  • Uses less power than a conventional AC.
  • Integrated LED nightlight.
  • No venting required – easier to set up.


  • Limited performance –the cooler may not chill you as well as an ordinary AC, especially in hot weather.
  • Not ideal for humid areas.
  • No timer.
  • You cannot select a specific temperature.

Our Review

Evaporative Cooler 

The evaCHILL works differently from other portable air conditioners.

With normal ACs, a condenser coil that carries a refrigerant cools the warm air. With an evaporative or swamp cooler, the air is blown across water-soaked pads.

It evaporates the water, making the warm air cooler and more humid.

While most portable ACs work with dehumidification, the evaCHILL works by humidification. It blows cool, moist air.

That’s why we recommend it for low humidity areas.

To set it up, you’ll need to add water to the reservoir. A full tank lasts about 9 hours, making it perfect for overnight use.

Cooling Power 
Evapolar ac

BTUs don’t apply to swamp coolers like the evaCHILL. Instead, they are sized based on the airflow.

The evaCHILL is a small cooler with relatively weak airflow. It works only as a personal cooler, not a room cooler.

You have to place it right in front of you or next to you to feel the cool breeze.

You can use it to cool your work area, your sleeping area, or the couch area. One customer says he uses it to cool the trunk when he’s carrying his pet.


If you live in a dry area like Arizona or California, the evaCHILL can make the air more comfortable to breathe by humidifying it.

It’s especially helpful for people who get a cough or dry throat when they breathe dry air.

As with cooling, the evaCHILL can only humidify a small area. To enjoy the moist air, place it just a foot or two away with the vents facing you.

Air Filter 

The evaCHILL also works as a personal air purifier, though it’s certainly nowhere near as good as a dedicated HEPA air purifier.

It has filters that trap dust, pet hair, pet dander, pollen and other allergens from the air passing through it.

It significantly improves air quality around you.

Highly Portable 
small portable ac

The evaCHILL weighs just 2.78lbs, making it easy to carry it with you to the office, bedroom or couch. You can even use it in your RV, boat or when camping.

Its compact design means it takes up very little space.

It is USB-powered, which adds to its portability. As long as you have a place to plug in the USB – your laptop, a power bank, a solar generator, etc. –you can use evaCHILL.

Four Fan Speeds

You can vary cooling power and noise level by selecting from the four fan speeds. A higher fan speed passes more air through the cooler, meaning a larger amount of cool air also comes out.

The fan is a bit noisy when set on the highest setting. But the lower setting is almost inaudible. It’s perfect for sleeping or work.

Other features

One button control: There’s no control panel or remote control; just a single button that controls power on/off, fan speed and mode.

7.5W power consumption: Uses very little power. That’s why you can power it via USB.

Ultra-quiet: Operates much more quietly than other portable ACs. Perfect for night time use.


For personal use only: To emphasize, this is not a room cooler or humidifier. You’ll be disappointed if you expect it to work as a normal portable AC. It only cools a small area around you.

Air is not cold: Evaporative coolers generally have lower performance compared to standard refrigerant-based coolers. They produce cool rather than cold air, which can be a limitation in very hot weather.

Not suitable for humid areas: The cooling performance of evaporative/swamp coolers like evaCHILL is significantly reduced when it's used in humid areas. Only buy the evaCHILL personal evaporative cooler if you live in a hot and dry area.

No temperature control: You cannot select a preferred temperature.

No Timer: You cannot set it to turn off after you sleep.


Airflow rate: 49.1 сfm

Room size: 45 sq. Ft.

Weight: 2.78 lbs

Dimensions: 9.7 x 8.5 x 8.3 inches

Noise level: Approx. 50 dB

small portable ac

The Evapolar evaCHILL works great, but it’s not ideal for room cooling, which is what most people want.

If you want a swamp cooler that can handle an entire room, we recommend the Luma Comfort EC110S portable evaporative cooler.

This great unit from Luma Comfort is rated for small to mid-size rooms of up to 250 square feet.

Like other swamp coolers, it works by dehumidifying the air as it cools, making it ideal for hot and dry climates.


  • Ideal for whole-room cooling, unlike the evaChill.
  • Three fan speeds plus wind mode.
  • Cools and humidifies.
  • Less energy consumption than an ordinary portable AC.


  • Works only in hot and dry climates with low humidity.
  • Limited cooling performance compared to conventional AC.

Our Review

Cooling Power 

Swamp coolers are sized by their airflow rate, not by BTUs. The Luma Comfort EC110S is rated at 500 CFM or cubic feet per minute (in comparison, the evaCHILL personal cooler is rated at just 49.1 CFM).

It can cool spaces up to 250 square feet. So unlike the evaCHILL, the Luma Comfort EC110S is a room cooler.

You can also use it outdoors during picnics, camping, or at the patio.

Luma Comfort cooling

It’s not as effective at cooling as a standard portable AC. But in the right conditions –a hot and dry environment –it can drop temperatures by as much as 20-30 Fahrenheit.

Being an evaporative cooler, you can’t select a specific temperature. The only way to adjust how much it cools is by increasing or decreasing fan speed. There are three cooling speeds to choose from.

Ice Pack Cooling 

The Luma Comfort EC110S works well enough with just clean water.

If you want it to cool faster, use the included ice pack. Put it in the freezer until it freezes and then place it in one of the water reservoirs.

You can also use your ice.

The ice is especially helpful on very hot days. It will cool the room faster.

Swing Function 

If you are alone in the room, you can position the air outlet to face your direction.

If you want to cool the entire room evenly, press the SWING button. It activates an oscillation feature. The fan head will oscillate to spread cool, moist air throughout the room.

Remote Control 

You can use the control panel on the unit or the included remote control to adjust settings.

The remote control has all the functions available on the control panel including on/off, fan speed control, timer, mode selection, and SWING function.

Other Features 
Luma Comfort EC110S

Timer: You can set the cooler to turn off automatically after a certain period. The timer goes up to 7.5 hours.

Water level indicator with auto shut-off: You can easily monitor the water level without having to remove the water tank. A graduated indicator at the front shows how much water is remaining. If the water gets too low, the unit will sound an alarm then turn off automatically.

Natural mode and sleep mode: In natural mode, the cooler operates normally. It’ll automatically adjust airflow speed. In sleep mode, the cooler gradually lowers fan speed until it gets to the lowest setting.


Not as good as a standard AC: If you are looking for a cooler that will chill the room in hot weather, this is not it. It does cool the room to a comfortable level, but it doesn’t perform as well as a standard AC.

Runs out of the water quickly: You’ll have to refill the reservoir frequently. For a cooler of this size, they should have made the reservoir a bit bigger.

Only works in specific environments: Similar to evaCHILL, the Luma Comfort swamp cooler will only work in a hot and low humidity area. 


Airflow rate: 500 сfm

Room size: 250 sq. ft.

Weight: 16.2lbs

Dimensions: 12.8 x 11.2 x 34.5 inches

Noise level: Approx. 66 dB

Whynter Elite ARC-122DHP

All the portable air conditioners we’ve covered so far are single-hose. That means they have only one hose to exhaust air out of the room.

This causes some issues that we’ll discuss later on.

A dual-hose air conditioner has two hoses that attach to the same window bracket.

One hose pulls air from outside (rather than inside the room as is the case with single-hose units) and the other exhaust warm air back outside.

Dual hose portable ACs are more efficient especially in large spaces.

The Whynter portable AC unit is not the only a dual hose, but it also is a dual function unit meaning it can cool and heat your room.

Overall, this is the best small portable AC for year-round use in larger rooms.


  • 4-in-1 AC: AC, fan, heater, and dehumidifier
  • Ideal for larger rooms up to 400 sq. Ft.
  • It comes with an activated carbon filter plus an air filter – together, they remove odors, allergens, and other pollutants.
  • More efficient than a single-hose portable AC.


  • Pricey.
  • Build quality is wanting. Certain components break easily.
  • Noisy when the fan is set on the highest speed.

Our Review


Rated at 12,000 BTUs, the Whynter Elite ARC-122DHP is one of the most powerful compact portable ACs you can buy.

It works great in large rooms of up to 400 square feet. If you are looking for a portable AC that can cool an open concept living room, a great room, or a large bedroom, the Elite ARC-122DHP is a great choice.

The air conditioner cools fast, quickly bringing down temperatures on hot days.

To get the best cooling performance, select the highest fan speed. For cooler days, the medium fan speed setting provides the best balance between performance and quiet.

At night, the lowest setting is the quietest.

Dual Operation 
Whynter Elite

You don’t have to put the air conditioner away during winter. Switch to the heat function to continue enjoying the AC.

The heat output is rated at 10,000 BTUs, which is powerful enough to warm a large room.

When in heat mode, you can set a maximum temperature of 89F.

Dual-Hose Setup 

A dual-hose portable AC does not have the negative pressure issues that single-hose units have. That’s because it doesn’t draw air from the room, but rather outside.

This increases its operational efficiency, allowing it to cool the room faster.

You can also use the Whynter Elite ARC-122DHP as a standard single-hose AC. Just remove the intake hose.

But it may take slightly longer for the AC to cool the room.

Dehumidification with Auto-evaporation

In addition to the standard cooling and heating modes, the Whynter Elite ARC-122DHP also has a built-in dehumidifier that can remove up to 76 pints of water from indoor air per day.

In most cases, the AC will exhaust the moisture along with the hot air outside.

But in high-humid environments, connect the included drain line to get rid of excess condensate.

The AC has a built-in pump for easy and efficient draining.

Remote Control 

With the full-function remote control, you can adjust everything from temperature to fan speed without having to stand up to reach the control panel.

Dual Filters 

Incoming air passes through two filters: a washable pre-filter that removes dust and other allergens and an activated carbon filter that traps smaller particles as well as odors.

Window Kit 
Whynter Elite window kit

The window kit includes two hoses for intake and exhaustion, each extendable to 60” long. You also get a window bracket that expands to a max length of 46”.

It works great for both vertical and horizontal sliding windows.

You can also use it with a sliding door though you’d need to buy an extra bracket to fit the full height of the door.

Other Features
Whynter Elite

Caster wheels: The Whynter Elite ARC-122DHP is a little hefty at 60lbs, but one person can still move it to another room thanks to the smoothrolling caster wheels.

Auto-restart: After a power outage, the AC will automatically restart with the previous settings.

24hr timer: Set the AC to come on or turn off automatically after a specific number of hours.


Fair build quality: For a portable AC of this price, the build quality is wanting. Certain components like the caster wheels and the window kit feel a bit delicate.

Loud: The manufacturer provides a noise level of around 52 dB, but according to customer reviews, the unit is louder than that when operating at the highest fan speed. But the middle and lowest setting quiet enough that you can sleep or watch TV while it’s on.


Power: 12,000 BTUs cooling, 10,000 BTUs heating

Room size: 400 sq. Ft.

Weight: 60lbs

Dimensions: 17 x 29.5 x 16 inches

Noise level: Approx. 52 decibels at the highest setting

Dehumidification capacity: 76 pints/day

small portable ac

The Global Air unit is one of the most affordable 10,000 BTU portable air conditioners, meaning it is suitable for rooms up to 400 square feet.

It’s a great choice for anyone who is looking for an affordable but powerful portable AC that can efficiently cool for a large room.


  • Good value for money.
  • Can cool large rooms.
  • Self-evaporation with the option of continuous draining for high-humidity areas.
  • Wheels for easy portability.


  • Loud when the fan is set on high.
  • The drain port is set too low – makes manual raining difficult.

Our Review


The Global Air portable AC is designed to cool large rooms of up to 400 square feet.

With a power rating of 10,000 BTUs, it’s perfect for open style living areas, large bedrooms, and open basements.

It cools fairly fast even on a hot day, especially when you’ve selected the high fan speed.

If it’s not very hot or you want to reduce the noise level, select the lower speed (there are only two-speed settings).

Cooled air comes out of the unit in four directions, which allows it to spread evenly throughout the room. It’s partly why the AC cools the room quickly.

Dehumidification with Self-evaporation
small portable ac

Similar to most other portable ACs, this portable air cooler has three operational modes: the standard cooling mode, a fan-only mode, and a dehumidification mode.

The dehumidifier is handy when the air is hot and humid. It quickly removes moisture from indoor air and exhausts it outside through the hose.

If you live in a particularly humid place, use the provided drain hose to get rid of excess condensate. Otherwise, the unit is going to shut down and indicate an error.

Window Ventilation Kit 

The window kit is easy to set up. It works with just about any sliding window, both horizontal and vertical.

The window kit fits windows up to 50.75” wide or tall. The minimum length is 12”.

If your window is less than 12”, you can trim the window bracket for a perfect fit.

Remote Control 

The AC comes with a handy remote control for adjusting the fan speed, temperature, and mode.

You can also adjust various settings using the digital control panel on top of the unit.

Other Features 
Global Air ac

Sleep mode: The AC will operate at the lowest fan speed setting. It will increase the temperature by 1 degree every two hours with a max increase of 2 degrees.

Max cool mode: Unit operates at the highest fan speed setting.

Auto mode: Select this mode if you don’t want to keep adjusting the temperature. The AC will automatically switch to cool mode when room temperature goes above 77F and fan mode when it goes lower.

Timer: You can set the 24hr timer to switch the AC on or off automatically after a set amount of time.


A bit loud: When set to the highest fan speed, the AC can be a bit intrusive. Switch to the slower speed at night to reduce the noise.

Difficult to drain: In humid climates where self-evaporation doesn’t work well, it can take too long to drain the tank because the drain port is set too low. You might have to set the AC on a raised platform for easier draining.


Power: 10,000 BTUs

Room size: 400 sq. Ft.

Weight: 62.5lbs

Dimensions: 17 x 13 x 31.3 inches

Noise level: Not specified

Dehumidification capacity: Not specified


If you live in a humid area, we recommend this hOmeLabs system.

At 100 pints a day, it has one of the highest dehumidification capacities of any portable AC.

It can dehumidify even the largest rooms - up to 5,500 square feet.

The cooling function is more limited, however. This 14,000 BTU portable AC can cool rooms up to 600 square feet in size.


  • Can cool large rooms.
  • Powerful built-in dehumidifier.
  • Energy-saving auto mode.
  • Wheels for easy portability.
  • Dedicated sleep mode – reduces fan noise and adjusts temperature for deep sleep.


  • No auto-evaporation. You have to connect a drain hose when using a dehumidifier.
  • Pricey.

Our Review


At 14,000 BTUs, this is one of the most powerful portable air conditioners. It’s designed to cool large rooms between 550 and 600 square feet.

It’s perfect for open concept living areas, large bedrooms, open basements, and other large spaces.

It cools pretty fast, even on a really hot day.

To adjust cooling power, select low, high or auto fan speed.

Multiple Modes 
hOmeLabs sleep mode

Cool: This is the cooling mode. You can set a target temperature anywhere between 62°F and 86°F and select your desired fan speed.

Dry: This is the dehumidification mode. You can set your desired humidity level, but you cannot change temperature or fan speed. The unit will operate at a low fan speed until the room has been dehumidified.

Fan: If you only want mild cooling, the fan mode is ideal. It turns off AC cooling, leaving only the fan to circulate air in the room gently.

Auto mode: In this mode, the unit will select the right mode (between cool and fan) and fan speed based on the target temperature you’ve selected.


There’s no limit to the size of the room you can dehumidify with the hOmeLabs portable AC.

It can dehumidify any space from a small home office to an open style loft apartment. According to the manufacturer, it’s good for any space up to 5,500 square feet.

But remember that that’s only for dehumidification. For cooling, the limit is 600 square feet.

If you want to dehumidify a large space, make sure you’ve selected the DRY mode.

You also need to connect the drain line to the port at the back.

The AC does not have a built-in reservoir. So continuous drainage is a must.

The drainage is gravity-fed so ensure you direct the hose somewhere where the water will flow easily on its own.

The drain port is located in the middle of the unit at the back. So you can easily direct the water to drain in a pan or bucket on the floor.

Note: In dehumidification (Dry) mode, you cannot select temperature or fan speed. But you can select your preferred humidity level. The unit will operate at the lowest fan speed until it achieves the target humidity level.

Window Kit 

The hOmeLabs AC comes with a complete window kit that is easy to set up. The kit includes window sliders, the exhaust hose, foam seals and adaptors.

The two window sliders can be adjusted to fit windows between 26.5” and 48” wide (or high, if you have vertical sliding windows).

If your window is smaller than 26.5”, you can cut one of the sliders to fit.

Unlike most ACs, the hOmeLabs includes foam adhesives that you place around the window frame for an airtight fit. This prevents outdoor air or warm exhaust air from coming into the room.

Most customers said it took them less than 10 minutes to have the window kit set up.

It’s also easy to take it down when you want to use the AC in another room.

Note: You don’t need to set up the window kit when using the DRY mode.

Remote Control 
hOmeLabs remote control

You can use the digital control panel or the intuitive remote control to configure various settings.

The remote control is, obviously, more convenient. It has its small digital display and all the functions available on the control panel.


Being a 14,000 BTU portable air conditioner, the hOmeLabs AC is unsurprisingly heavier than most other units.

But moving it between rooms is still easy thanks to the smooth-rolling wheels designed to work on any flooring.

Where you might need some help is taking the unit upstairs.

Noise Level 

While the manufacturer has not stated the exact noise level of the hOmeLabs AC, customers say it’s not very loud.

At the highest fan setting, it’s as loud as a ceiling fan. At the lowest setting, you can easily fall asleep.

The quiet operation is especially impressive for a portable AC this powerful.

Other Features 
hOmeLabs swing function

Sleep mode: In sleep/eco mode, the unit reduces the temperature by 2F every 30 minutes. After two decreases, it maintains the new temperature for 7 hours. It also switches to the lowest fan speed to reduce noise levels for a more peaceful sleep.

Swing function: The swing button on the remote control lets you adjust the angle of the air outlet vents to direct air towards a particular part of the room.

Timer: You can set the unit to start or switch off automatically after a certain number of hours.

Washable filter: No need to replace the filter. Just wash it (every two weeks) and put it back in.


Pricey: If you are looking for a budget portable AC, this is not it.

The drain line is necessary: This is not a self-evaporating AC. If you use the dehumidifier mode, you must set up continuous drainage. Otherwise, it might leak onto the floor.


Power: 14,000 BTUs

Room size: 550-600 sq. Ft.

Weight: Not specified

Dimensions: 17.9 x 15 x 30.7 inches

Noise level: Not specified

Dehumidification capacity: 100 pints/day

EdgeStar AP8000W

If you don’t have much space to spare, we recommend this portable AC unit from EdgeStar.

It measures 24.75” high, 19.25” wide and 13.25” deep, making it one of the most compact portable air conditioners sold today.

It’s light, too, weighing just 56 lbs. This makes it easy to move it from room to room.

At 8,000 BTUs, this portable AC is rated for use in small rooms up to 250 square feet.


  • Takes up less space than most portable ACs.
  • Self-evaporation, except when the humidity is high.
  • Easy to move from room to room.
  • Energy-saving programmable timer.
  • Three fan speeds to adjust cooling power and noise level.


  • The fan is a bit loud, especially when set on the highest speed.
  • No auto mode.

Our Review


The EdgeStar AP8000W has a modest 8,000 BTUs of cooling power.

It’s perfect for small spaces sized between 150 and 250 square feet. If you are looking for a compact and efficient AC for your small home office, den or bedroom, it is a great choice.

You can adjust cooling power by selecting low, medium, or high fan speed setting.

Dehumidification with Self-evaporation

The EdgeStar AP8000W has a built-in dehumidifier that can remove up to 50 pints a day from indoor air.

In most cases, the AC will exhaust the moisture out of the room along with hot air. There is no need to set up the drainage.

But if you leave the dehumidifier function on for extended periods or if you live in a humid area, you’ll need to drain the reservoir after some time manually.

If you don’t, a warning light will come on, and the AC will stop functioning until you drain the condensate.

Window Kit 
EdgeStar window kit

The ventilation kit is easy to set up. It’s compatible with vertical and horizontal sliding windows with a max-width/height of 38” and a minimum width/height of 29”.

The 49” exhaust hose is expandable to 55”.

Remote Control 

The EdgeStar AP8000W comes with a full-function remote control, though it lacks a display.

You can change mode (cool, dehumidify, or fan), select your preferred fan speed and increase or decrease the target temperature.

You can also switch between Celsius and Fahrenheit.

If you don’t want to use the remote control or you lose it, the unit has a digital control panel with similar functions.


The EdgeStar AP8000W is easy to move around.

If you are moving it across the floor to another room, the caster wheels make it an easy one-person job.

If you need to take it upstairs, it weighs a manageable 56lbs.

Other Features 
EdgeStar ac

Timer: A 24hr timer lets you set the AC to switch on or turn off automatically after a specific number of hours. This is handy when you sleep at night or when you want to come home to a cool living room.

Auto-restart: After a power outage, the unit will automatically restart with the previous settings when the power comes back. There’s no need to reset it.

Two filters: A washable pre-filter removes dust, pet hair and other allergens from air passing through the AC while a replaceable activated carbon filter filters out odors from the air.


The window kit is not airtight: Hot air sometimes flows back into the room through spaces along the edges of the window kit. The AC does not come with foam adhesive to create an airtight seal.

Tedious to drain: The drain port is set very low, making it a pain to drain the reservoir.


Power: 8,000 BTUs

Room size: 150-250 sq. Ft.

Weight: 56 lbs.

Dimensions: 24.75 x 19.25 x 13.25 inches

Noise level: Not specified

Dehumidification capacity: 50 pints/day

EdgeStar AP12000HS

If you want a portable AC you can use through all four seasons, we recommend this dual function EdgeStar portable cooler - heater.

With the click of a button, you can shift from cooling to heating.

It also comes with a built-in dehumidifier with a convenient self-evaporative function.

 The EdgeStar AP12000HS is rated for small and midsize rooms of up to 425 square feet.


  • Four functions: cool, fan, dehumidify, and heat.
  • Dual filters to remove allergens, odors, and other pollutants from indoor air.
  • Self-evaporative.
  • Energy-saving programmable timer.
  • Caster wheels for easy mobility between rooms.


  • Limited heating performance. It provides only supplemental heat.
  • Difficult to drain because of the low positioning of the drain port.

Our Review


The EdgeStar AP12000HS has 12,000 BTUs of cooling power. That’s enough to cool a room of up to 425 square feet efficiently.

There are three fan speeds to adjust airflow and noise level from: low, medium, and high.

Four Modes 
EdgeStar AP12000HS modes

Cool: This is the normal cooling mode. In this mode, you can select a temperature anywhere within 61-77 degrees F.

Heat: The heating function is handy in winter or at night. Note that the unit is more of a supplemental heat source. It works best in smaller spaces.

Dehumidify: The dehumidifier removes excess moisture from indoor air. If there isn’t too much humidity, it will exhaust the moisture out along with hot air. But if the room is humid, some of the condensates will collect in the pan at the bottom, and you’ll need to drain it after some time.

Fan-only: Select this mode when you only need mild cooling. You cannot select any temperature in this mode, but you can adjust the fan speed.

Window Kit 

Everything you need to set up ventilation through your window is included along with the AC.

The sliding window kit fits both vertical and horizontal windows. Maximum and minimum window size is 56” and 28.5” respectively.

The exhaust hose is 49,” but you can extend it a few inches further depending on your needs.

Note that the kit doesn’t include any foam or material to create an airtight seal around the window. So some hot hair may get back into the room.

Remote Control 

The AC comes with a convenient remote control will all the functions available on the main control panel.

You can adjust the temperature, fan speed, and operation mode without leaving the couch.

Other Features 

Timer: You can set auto-on or auto-off using the 24hr timer. This is handy when you want the AC to switch off automatically at night or come on before you get home.

Dual filtration: A pre-filter captures dust and other allergens while an activated carbon filter removes unpleasant odors from the air passing through it. The pre-filter is washable (wash it every two weeks), but you should replace the activated carbon filter every 3-6 months.

Automatic restart: It doesn’t lose settings if there is a power outage. When power comes back, it restarts automatically with previous settings.


Heating function not very powerful: If you are looking for an AC that can warm a large room, this is not it.

Tedious to drain: Because the drain port is located right at the bottom of the unit, it’s difficult to drain the reservoir pan.


Power: 12,000 BTUs

Room size: 300-425 sq. Ft.

Weight: 69 lbs.

Dimensions: 14.9 x 17.1 x 30.9 inches

Noise level: 52-54 dB

Dehumidification capacity: 81 pints/day

Sizing Your Portable Air Conditioner 

Room Size

BTU's Needed

Room Size

BTU's Needed

150 sq. ft.

5,000 BTU’s

700 sq. ft.

14,000 BTU’s

250 sq. ft.

6,000 BTU’s

1,000 sq. ft.

18,000 BTU’s

300 sq. ft.

7,000 BTU’s

1,200 sq. ft.

21,000 BTU’s

350 sq. ft.

8,000 BTU’s

1,400 sq. ft.

23,000 BTU’s

400 sq. ft.

9,000 BTU’s

1,600 sq. ft.

25,000 BTU’s

450 sq. ft.

10,000 BTU’s

1,900 sq. ft.

28,000 BTU’s

550 sq. ft.

12,000 BTU’s

2,700 sq. ft.

36,000 BTU’s

Power is the most important factor when you are shopping for a portable air conditioner. It determines how efficiently and quickly the AC cools (or warms for dual function units) a particular room.

The cooling or heating power of an AC unit is expressed in BTUs or British Thermal Units

Generally, you need about 20 BTUs for every square foot.

ASHRAE vs. 2017 DOE Standards

When you are shopping for an AC, you may notice that most have two separate BTU figures, one lower than the other.

The main figure, the highest, is labeled as the ASHRAE 128 standard while the lower one is the DOE standard. What’s the difference and which figure is more accurate?

Both are technically accurate; it’s just that the testing standard has changed.

In 2017, the Federal Trade Commission introduced new labeling rules for portable air conditioners.

This came about because the Department of Energy had changed their testing guidelines for portable ACs in 2016.

The new test took into account a wide variety of situations to more accurately reflect the unit’s performance and efficiency.

The updated testing guidelines resulted in a lower BTU rating for portable ACs.

For example, a unit might have a BTU rating of 10,000 BTU according to the ASHRAE standard but only 6,000 BTU according to the new DOE standard.

All the BTU ratings mentioned in the buying guide above are based on the ASHRAE standard.

Types of Small Portable Air Conditioners

small portable ac

Single-Hose vs. Dual Hose ACs 

EdgeStar AP8000W

Most small portable air conditioners are single-hose. You can easily identify them because they have only one hose taking the hot air out through the window ventilation.

The unit pulls in air from the room, cools it and sends it around the room using a fan. The hot air is directed outside through the exhaust hose.

Sometimes, this leads to negative air pressure in the room, resulting in hot outdoor air coming in through cracks in the windows or under the door.

But the effect is usually not big enough to significantly reduce the AC’s efficiency.

A dual-hose AC has two hoses connected to the window: one to exhaust hot air outside and one to pull in air from outside for cooling.

Because it does not draw hot air from the room, a dual hose AC does not create negative air pressure.

This can slightly increase its efficiency, especially in large rooms.

On the downside, dual hose ACs use more power than single-hose units. They also tend to be bigger and heavier, making them less portable. In addition, they are noisier and more tedious to install since you need to set up two hoses. 

Portable AC vs. Evaporative/Swamp Cooler

small portable ac

A portable air conditioner uses a refrigerant, a type of chemical, to cool down hot air from outside.

You can set a specific temperature and even turn on a dehumidifier function.

An evaporative cooler also called a swamp cooler, does not rely on any chemical at all. Instead, it consists of a fan blowing air across water-soaked pads.

The air absorbs the moisture and cools down.

A swamp cooler not only cools the room, but it also humidifies it.

Evaporative coolers work best in hot and dry areas such as the southwest. Because they don’t have a lot of cooling power, they are ideal for small to midsize rooms and personal spaces.

Unlike a portable AC, you cannot set a specific temperature with an evaporative cooler.

The biggest advantage of a portable air conditioner is its cooling power. It can cool the room much faster regardless of the environment. 

In contrast, evaporative coolers do not cool as well and they only work in hot and dry areas like Texas and Arizona. 

On the upside, evaporative coolers are lighter and smaller. They also use less power since they lack a compressor. 

Buying Guide: How to Choose a Small Portable AC

small room ac

Most portable ACs may seem to be similar in look and function, but there are quite a few differences in terms of features, power, and quality.

Here are the most important features to consider when you are buying a small portable air conditioner.

1. Power (BTUs) and Room Size 

Power is the most important thing to consider when you are looking for a new portable air conditioner. The number of BTUs - or BTU capacity - will depend on the room size you’ll be using the AC in.

If you plan to use it in several rooms, use the size of the largest room as a guide for selecting the proper BTU capacity.

Here are some general guidelines to follow when matching BTUs to room size.

  • 8,000-10,000 BTUs for a room measuring 300 square feet or less
  • 10,000-14,000 BTUs for a room measuring 300-500 square feet
  • 14,000 BTUs or more for a room measuring 500 square feet or more

2. Built-in Dehumidifier 

Honeywell dehumidification

Next, check whether the AC comes with a built-in dehumidifier. Virtually all portable ACs have it except swamp coolers (evaporative air conditioners).

Instead of dehumidifying, these coolers act as humidifiers, by adding moisture to the indoor air.

Only buy an evaporative cooler if you live in a hot and dry state like Arizona or California.

3. Dual Function – Heating and Cooling

Most small portable air conditioners work only as coolers. That means you only use it during hot seasons and put it away during the colder months.

If you’d like an all-year-round AC, look for one with dual heating and cooling functions.

4. Noise Level 

small portable window air conditioner

All portable air conditioners make some noise. This noise comes from the fan spinning as it pulls in air and sends it out into the room.

Generally, portable ACs are quieter than window air conditioners. The loudest ones are about as loud as a fan at full speed.

Some ACs can be pretty loud when running at the highest fan speed. Check the manufacturer-stated noise level in decibels or read customer reviews for an idea of how loud the unit is.

If you are buying an AC primarily for use in the bedroom, home office, or baby nursery, look for one that operates relatively quietly. When set at a lower fan speed, it should barely make any noise.

5. Remote Control 


The Remote control is a must-have. It’s tedious to keep standing up to lower the temperature or change the fan speed.

With a remote control, you can configure all settings from the couch (or bed).

You can go even further and get a Wi-Fi connected portable air conditioner. You can then monitor and control your home temperature and humidity level wherever you are. 

6. Self-evaporative

The moisture that a portable AC removes from the air has to go somewhere.

Most ACs have a self-evaporative feature where the moisture is exhausted out of the window along with hot air.

But you may still need to drain the water reservoir if there is too much humidity in the air or you leave the dehumidifier function on for long.

If you live in a humid area, you may find it easier to use a non-evaporative AC that uses gravity or pump drain instead.

7. Extra Features 

hOmeLabs swing function
The most important thing is to avoid buying a portable AC that’s under-powered (won’t cool the room quickly enough) or too big for the room (wastes energy and can make the room uncomfortable).

Here are some extras to look for.

Sleep mode: Sleep mode adjusts room temperature automatically to create the best sleeping environment. It also reduces fan speed to minimize fan noise.

Timer: A timer allows you to set the AC to turn on or turn off automatically after a certain number of hours. You can set it to turn off in the middle of the night after you sleep or turn on and cool the living room before you get home.

Auto mode: Auto mode is a convenient set-and-forget feature. The AC will monitor room temperature and automatically adjust fan speed or temperature to keep the room comfortable.

Activated carbon filter: Most portable ACs come with a standard washable filter that filters out allergens and other particles from the air. An AC with an additional activated carbon filter also removes unpleasant odors from the air.

Swing function: When buying an AC, look at pictures of the control panel or remote control to see if there is a SWING button. This button turns the air vents to direct air towards a specific part of the room. You can use it to cool where you are sitting faster.

Properly Ventilating a Portable AC

EdgeStar AP8000W

One of the biggest advantages of a portable AC is that it doesn’t require much installation. 

All you need to do is set up a temporary window ventilation to remove hot air and moisture from the room.

Your portable AC should come with a complete ventilation kit that contains the following :

  • An extendable hose (two hoses if you buy a dual-hose AC)
  • A pair of window sliders (also called a window bracket)
  • Adapters for attaching the hose to the window sliders and the back of the AC
  • Foam seal (not included for most portable ACs)
  • Screws to secure the window sliders(some ACs only)

Check the list of parts in the manual to make sure everything is there. If something is missing or appears damaged, contact the manufacturer immediately.

If all the parts are there, you can begin the installation. You don’t need any tools.

  • Fit the window bracket on your window. Check the maximum and minimum window size it can fit before you order.
  • Open your window and position the bracket in place. This can be horizontally or vertically depending on the type of sliding window.
  • Extend or shorten the bracket to fit within the window frame.
  • If the bracket doesn't cover the entire window, you’ll have to order extensions from the manufacturer. If your window is smaller than the minimum recommended size, cut one of the pieces shorter.
  • With the bracket in place, close the window to hold it firmly. If there are sizable gaps left between the bracket and the window frame, use foam seal to create an airtight seal that keeps out outside air.
  • Position the AC unit close to the window, making sure to leave the recommended clearance between the back of the AC and the wall. The AC should be close enough to the window that you don’t have to extend the hose too far.
  • Connect the hose to the back of the unit and the window bracket using the included adaptors or connectors.
  • Connect the air conditioner to a power outlet and switch it on.

Your AC is ready to use.

Portable AC Maintenance 

small portable ac units

A portable air conditioner doesn’t require much in terms of maintenance.

The only thing you’ll need to do is regularly wash the filter every 2-4 weeks, depending on the quality of air in your area.

If your AC comes with an activated carbon filter, you’ll need to replace it every few months.

Evaporative coolers are a bit more involving in maintenance. You have to refill the water tank every few hours.

Frequently Asked Questions About Small Portable Air Conditioners

Portable Air Conditioners

Do I have to vent a portable AC out of the window? 

A portable AC needs ventilation to release heat outside. The window is the easiest and the most convenient place to vent the AC.

But if the room doesn’t have a window or you have a non-compatible window (portable ACs work only with sliding windows), you can set it up to vent through a sliding door, a hole in the wall leading outside or into the garage or through a drop ceiling.

These alternatives will require a bit of DIY-ing to work, and you may face some limitations depending on where you live.

Are there portable air conditioners without exhaust?

Evaporative air conditioners, also called swamp coolers, don’t have any exhaust. They work by introducing moisture-cooled air into the room rather than extracting heat.

So you don’t need to set up any venting.

Is a portable AC as good as a window unit? 

A portable AC uses slightly more energy than a window AC, but it works just as well. Of course, you have to make sure you select the right size (in BTUs) for the room.

A portable AC has several advantages over a window unit. It is easier to install (requires no installation really; just ventilation). Besides this, it is easier to move to another room, and operate more quietly than a window AC.

Are portable air conditioners expensive to run?

It depends on the size of the AC, its efficiency, room size, and temperature.

A higher BTU AC will use more energy. An air conditioner cooling a large room or working in hot weather will also use more power since it has to work harder.

Generally, it costs about $2.84 a day to run a small compact AC for 8 hours a day. A larger unit will cost anywhere between $3 and $6. 

To get more accurate figures, check the wattage of the AC. Multiply that by the average number of hours you’ll be using it per day and then divide the result by 1,000 to get the daily consumption in kilowatt-hours.

Multiply that with the unit cost of a kWh your utility charges to see how much the AC costs to run per day.

Note: To reduce consumption, look for ACs with energy-saving features such as auto mode and eco mode.

Do portable air conditioners need to be drained?

If your air conditioner is self-evaporative, you won’t need to drain it during normal use. It will exhaust moisture out of the window together with the hot air.

But if there is a lot of humidity, you may need to connect a hose to the drain port to remove the condensate.

Some ACs don’t have a self-evaporative feature. You have to keep a drain hose connected all the time.

Can a portable air conditioner cool a whole house?

Not really, unless you live in an open style loft apartment with no dividing walls. In a normal home, even if you buy a powerful 14,000 BTU air conditioner, the fan can’t move the air efficiently to all rooms.

If you need constant cooling in different rooms, consider buying two or three smaller portable ACs instead of one big one.

Are portable air conditioners noisy? 

Most portable ACs sound like a desktop fan. But the noise level depends on the design and quality of the AC.

Some brands are quieter than others.

If the AC is too loud, select lower fan speed. It will take longer to cool the room, but it will be quieter.

Which is the lightest portable AC in our buying guide?

The Honeywell MO08CESWK is the lightest portable AC in our buying guide, weighing 43lbs. The Evapolar evaCHILL is the lightest swamp cooler we’ve reviewed at just 2.78lbs.

What’s the price range of small portable AC? 

At the lower end, small portable ACs designed for small rooms cost between $200 and $350. Larger units that can cool a medium-size room cost between $350 and $500.

High-end portable ACs cost around $500 to $700. These units have more cooling power and high dehumidifying capacity.

If you are looking for a swamp cooler, you can get a good-sized unit for under $200 and mini personal coolers for less than $100.

Top 10 Small AC Units Compared: Specification Chart

Disclamer: All links below go to

Noise Level
Dehumidification Capacity
Honeywell MO08CESWK
Honeywell MO08CESWK
8,00043 lbs
13.5 x 14.6 x 27.7 inches
53 dB
44 pints/day
8,00052.9 lbs
16.5 x 11.5 x 26 inches
75 dB
Honeywell HL12CESWB
Honeywell HL12CESWB
12,00078.3 lbs
35 x 20.5 x 18.3 inches
52 dB
86 pints/day
Evapolar evaCHILL Swamp Cooler
Evapolar evaCHILL Swamp Cooler<br />
<br />
N/A2.78 lbs
9.7 x 8.5 x 8.3 inches
50 dB
Luma Comfort EC110S
Luma Comfort EC110S<br />
<br />
N/A16.2 lbs
12.8 x 11.2 x 34.5 inches
66 dB
Whynter Elite ARC-122DHP
Whynter Elite ARC-122DHP <br />
12,00060 lbs
17 x 29.5 x 16 inches
52 dB
76 pints/day
Global Air Portable AC
Global Air Portable AC<br />
10,00062.5 lbs
17 x 13 x 31.3 inches
hOmeLabs Portable AC
hOmeLabs Portable AC<br />
<br />
14,00070 lbs
17.9 x 15 x 30.7 inches
100 pints/day
EdgeStar AP8000W
EdgeStar AP8000W<br />
<br />
24.75 x 19.25 x 13.25 inches
50 pints/day
EdgeStar AP12000HS
EdgeStar AP12000HS Portable AC and Heater<br />
<br />
14.9 x 17.1 x 30.9 inches
54 dB
81 pints/day