Top 11 Smallest Window Air Conditioners for Small Room

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There are many reasons to buy a small window air conditioner. Perhaps you have a small room to cool and don’t want it “freezing” in there. You might also have a small window and need a mini window air conditioner to fit it.

These are the smallest window air conditioners available in sizes from 5,000 to 12,000 BTU. The reason we included larger sizes is that many homeowners want a small window unit that can deliver 8K to 12K BTUs of cooling power. All of these window AC units are compact window ACs.

Smallest Window Air Conditioners

When most people search for the smallest window unit, they want the small AC for a small bedroom, office or den of up to 150 square feet.

If you’re looking for a larger AC that is still compact, see the table and reviews of small 6,000 to 12,000 BTU models.

Editor’s Note: The inventory of the smallest window air conditioners can change rapidly as new models become available and older models sell out and are no longer offered. If you don’t find one or two of the units on this list, you have two options:

1 – Keep browsing through the list. You’re sure to find another AC unit on it that will suit your needs just as well.

2 – Browse the site. Once you’ve clicked through to check a price on Amazon, browse around to find a highly rated small window air conditioner or do a search for the size you prefer, such as “5000 btu window AC” or “8000 btu window air conditioner.” Again, we’re confident that you will find a unit that will cool and dehumidify your room very nicely. Use the Star ratings on the site to find a top rated small window AC that will deliver reliable performance in the years ahead.

Here are the best AC units considered the smallest window air conditioners due to their compact size.

Small Window Air Conditioner Reviews

Following are reviews of the 11 models in the list including key dimensions, pros, cons and features.

Smallest Window Air Conditioners: 5,000 BTU

      Image                    Product


#1 TCL 5WR1-A 5,000 BTU

  • 15.2 (W) x 15.98 (D) x 12.52 (H) inches
  • 37.7 pounds
  • 5000 BTU for 150 sq. ft.
  • Easy Mechanical Controls
  • 2 Fan Speeds, 8-way Airflow

Editor's Pick

Midea 5,000 BTU MAW05M1BWT

#2 Midea 5,000 BTU MAW05M1BWT

  • 16 (W) x 13.2 (D) x 12.1 (H) inches
  • 39.4 pounds
  • 5000 BTU for 150 square feet
  • Dependable Mechanical Knob Controls
  • 2-way Airflow & 7 Temp Settings
Keystone Energy Star

#3 Keystone Energy Star 5,000 BTU

  • 16 (W) x 15.4 (D) x 12 (H) inches
  • 47.4 pounds
  • 5000 BTU for 150 square feet
  • Low Profile Height
  • Energy Star Efficiency for Low Electric Bills
Frigidaire White FFRA051ZA1

#4 Frigidaire FFRA051ZA1 5,000 BTU

  • 16 (W) x 16 (D) x 11.9 (H) inches
  • 39.7 pounds
  • 5000 BTU for 150 square feet
  • Very Low Profile
  • 2 Fan Speeds / Hi & Lo AC

#1 TCL 5WR1-A 5,000 BTU

Light and totally reliable, this TCL 5000 BTU window AC is one of the highest rated in its size. That’s why our pro editor made it the Editor’s Pick.

The mechanical knobs aren’t fancy, but they are durable and make setting the AC to the right fan speed and cooling level simple and quick. This also reduces the cost of the unit – so if you need cool air in more than one small area, why not pick up a couple or three of these? You’ll save thousands over the cost of central air conditioning!

Did you know? TCL makes this line of reliable window AC units in additional sizes  from 6,000 to 10,000 BTUs. Select the link, and scroll down to choose other sizes, if you need compact window air conditioners of a larger size.


Height x Width: 12.5 x 16 inches

Window Size: Widths from 23-36 inches and height at least 14.5 inches

Pros: Highly rated and among the most affordable – and that adds up to excellent value. The 8-direction airflow settings will make your space more comfortable because cool air can be directed to where you’re located. The mesh filter is washable and reusable – a feature found on most of the best smallest window air conditioners.

Cons: No frills, just reliable mechanical controls – No remote or timer, and it isn’t Energy Star rated.

Bottom Line: When getting your bedroom, office or other small room cool at an affordable cost is the goal, consider this TCL 5000 BTU window AC. It is the best rated small window AC available.

#2 Midea MAW05M1BWT 5,000 BTU

Midea is a brand with one of the best reputations in the window air conditioner niche. You can expect reliable performance from this compact window AC, one of the top rated among the best smallest window ACs.

This is a low profile AC, so it is ideal for windows that don’t open very high.

5000 BTUs and More: Midea makes an entire range of quality window air conditioners. Select this unit and scroll down to see 5 models ranging from 5000 to 12000 BTUs. The 6K to 12K BTU models have digital controls and remotes, an ideal choice for larger rooms in your home.

Midea 5,000 BTU MAW05M1BWT

Height and Width: 12.05 x 15.98 inches

Window Size: Widths from 23-36 inches and height at least 13 inches

Pros: Highly rated, dependable and affordable. Plus, if you have a small window that won’t open very far, this unit needs the least clearance – just 13 inches – of any on the list. The energy efficiency is quite good. Low/High Cool with 7 settings and two fan speeds.

Cons: A basic model – no timer or remote.

Bottom Line: If you’ve had a Midea window air conditioner in the past, then you probably had a good experience with it. This model won’t disappoint!

#3 Keystone Energy Star 5,000 BTU

One of the best small window air conditioners with digital controls, you’ll enjoy precise cooling and the convenience of a remote control and bright LED display.

More Sizes: Keystone makes this line of quality window air conditioners in 8 sizes from 5000 to 25000 BTUs. If you need multiple ACs to fit rooms of different sizes, this series is an excellent choice. Select the Price button below, and then select the AC units that fit your needs.

Did you know? This has a “follow me” remote. What does that mean? The remote has a temperature sensor in it, so the AC won’t stop cooling until the area where the remote is located has been sufficiently cooled down. Keep the remote near you, and your space will remain cool and comfortable.
Keystone Energy Star

Height and Width: 12 x 16 inches

Window Size: 23-26 inches wide and a minimum of just 12.5 inches high for this low profile window AC.

Pros: Energy Star efficiency keeps electric costs under control. Digital controls include a 24-hour timer and “follow me” remote that ensures your comfort anywhere in the room. Sleep Mode and Energy Saver Mode included. Very quiet at 50.5 decibels on Low, slightly louder on High.

Cons: You’ll pay a little more for this model with digital controls, timer and remote. But not much. And if you want those conveniences, you’ll find it worth the extra few bucks, in our opinion.

Bottom Line: If you want Energy Star efficiency and the upgrades that come with digital controls, consider this Keystone low profile window AC for small rooms.

#4 Frigidaire White FFRA051ZA1 5,000 BTU

Frigidaire is a trusted name in window air conditioners, and this unit should live up to the brand’s reputation for quality and dependability.

This is a bare-bones, low profile window AC unit. If you want digital controls with a remote, see the Keystone model above.

Correcting the Info: At this writing, the Item Dimensions on the site are listed in centimeters, not inches. No, this item isn’t 41.2 inches wide and 30.2 inches high. We converted Centimeters to Inches for your convenience and alerted Amazon of its error. The description at top also lists a Remote Control. It does not come with one. We’ll see if Amazon is paying attention, but you can rely on the information Pick HVAC gives you.
Frigidaire White FFRA051ZA1

Height and Width: 11.9 x 16 inches

Window Size: 23-26 inches wide and a minimum of just over 12 inches high is needed.

Pros: Good-quality, basic operation at a decent price. Verified users give this ratings high enough for it to rank as one of the top smallest window ACs available. The low profile makes it ideal for windows that don’t open vertically very high.

Cons: Nothing fancy, and a little on the loud side at 55 decibels.

Bottom Line: If you have used Frigidaire appliances in the past and they “treated you right,” you’ll probably have a similar experience with this low profile window air conditioner.

Smallest Window Air Conditioners: 6,000-12,000 BTU

If you have more than 150 square feet to cool but need a compact window AC, these smallest window air conditioners are top choices. There are 6K, 8K, 10K and 12K BTU models.

      Image                    Product

Della 6,000 BTU

#5 Della 6,000 BTU

  • 19 (W) x 15.25(D) x 13.5(H) inches
  • 43 pounds
  • 6000 BTU for up to 250 square feet
  • Digital/Timer/Remote
  • Energy Star Rated for Efficiency
Midea EasyCool MAW06R1BWT

#6 Midea EasyCool MAW06R1BWT 6,000 BTU

  • 18.54 (W) x 16.02 (D) x 13.39 (H) inches
  • 49.7 pounds
  • 6000 BTU for 200-250 square feet
  • Digital controls – 24 hour timer, Remote
  • Energy Star Efficiency
Frigidaire Energy Star

#7 Frigidaire Energy Star 6,000 BTU

  • 18 (W) x 15.5 (D) x 13 (H) inches
  • 47 pounds
  • 6000 BTU for up to 250 square feet
  • Energy Star Certified
  • Remote with Full Functions
Midea U Inverter

#8 Midea U Inverter Window AC 8,000 BTU

  • 22 (W) x 19.2 (D) x 13.5 (H) inches
  • 68 pounds
  • 8000 BTU for 300-350 square feet
  • Energy Star Certified
  • U-shaped for Low Profile, Secure Installation
hOmeLabs 8,000 BTU

#9 hOmeLabs 8,000 BTU

  • 18.6 (W) x 15.6 (D) x 13.3 (H) inches
  • 47.4 pounds
  • 8000 BTU for 300-350 square feet
  • Energy Star Efficiency
  • Remote, Timer, Advanced Features
TaoTronics TT-AC001

#10 TaoTronics TT-AC001 Window Air Conditioner 10000 BTU

  • 21.5(W) x 19 (D) x 14.5 (H) inches
  • 70 pounds
  • 10000 BTU for 400-450 square feet
  • Best Features Available
  • Excellent Humidity Control
Frigidaire Energy Star

#11 Frigidaire Energy Star 12,000 BTU

  • 21.3(W) x 21.5 (D) x 15.7 (H) inches
  • 71.8 pounds
  • 12000 BTU for up to 550 square feet
  • The Most Compact 12000 BTU Window AC
  • Remote/Timer – All the Best Features

#5 Della 6,000 BTU

This Energy Star certified window air conditioner will reduce energy bills while keep your room of +/- 200 square feet cool and dehumidified. It features digital controls for accurate temperature balance and optimal climate control performance.

Della has proved to be a very reliable brand according to our research and the reviews of hundreds of verified customers.

Della 6,000 BTU

Height and Width: 13.5 x 19 inches

Window Size: 23-26 inches wide and a minimum of 14.5 inch opening height.

Pros: This is an energy saving window air conditioner with excellent reliability. It offers the convenience and performance features you expect –digital controls and display, a full-feature remote and multiple modes such as AC, and Fan-only Energy Saver. Enjoy the 24-hour timer and 4 fan-speed settings to customize your indoor comfort.

Better Refrigerant: This AC unit uses the latest and best refrigerant available, R32. It does not deplete ozone and it has a lower global warming potential (GWP) than the R410A refrigerant used currently in most window air conditioners.

Cons: It’s a little pricey, but we recommend that you check it out and evaluate its features before deciding whether the extra $30 or so is worth it. Many readers think it is, buy this model and remain very happy with it.

Did you Know? Della air conditioners in this series are available in multiple sizes, all with the same excellent customer ratings. If you need a compact window air conditioner at a different size, see the Della AC units from 5000 to 10000 in 4 different models – or scroll down the page to find even larger models up to 18000 BTU to serve rooms up to 1000 square feet.

Bottom Line: If you need a 6000 BTU unit for a room up to 225 or 250 square feet and want a reliable, digital window air conditioner, this Della AC unit should meet or exceed your expectations. The larger sizes are rated very highly too.

#6 Midea EasyCool MAW06R1BWT 6,000 BTU

Midea is a proven brand that makes high-rated AC units. This is one of the best smallest window ACs available in the 6,000 BTU size. It is Energy Star certified.

This Midea series is available in sizes from 5000 to 12000 BTUs, so if you need multiple sizes, select this model and choose the AC units in the right sizes for various locations in your home.

Midea EasyCool MAW06R1BWT

Height and Width: 13.4 x 19 inches

Window Size: 23-26 inches wide and a minimum of 13.5 inch opening height.

Pros: This AC unit has 3 modes: AC, Fan-only and Dehumidification or Dry mode, which is used on cool, damp days to dry the air without cooling it. It includes a timer and remote control. There’s a dirty filter notification when it is time to wash the filter. Sleep Mode and ECO energy saver mode give you more comfort options.

Cons: This highly rated window AC costs a little more than some on the list with mechanical knobs for controls – but this one gives you features they don’t offer.

Bottom Line: If you want a high-quality digital window air conditioner with all the top features, and are willing to spend just a little more for it, this Midea window AC is a very solid choice.

#7 Frigidaire Energy Star 6,000 BTU

This is a compact window air conditioner with Energy Star efficiency for lower electric bills. It’s digital, and the remote includes all the functions for controlling this AC unit from anywhere nearby.

The ratings are outstanding, and it also does a good job removing humidity, so the room will be more comfortable on even the muggiest days. The 51dB on low and 55dB on high noise level is about average for units this size.

Frigidaire Energy Star

Height and Width: 13 x 18 Inches

Window Size: Widths from 23-36 inches and height at least 13.5 inches

Pros: This unit needs just a little more than 13 inches clearance to fit in a vertically-opening single-hung or double-hung window. It has all the features you’d expect from Frigidaire, one of the leading appliance brands available today.

Cons: There are few drawbacks to this unit. Just keep in mind that it is just 6000 BTUs, so won’t cool a large room. If you use it in up to 250 square feet, such as a 12x20 room, for example, you’ll be fine.

Bottom Line: If you’re looking at compact AC units and want digital controls with a remote and timer, this unit should give you many years of dependability.

#8 Midea U Inverter Window AC Unit 8,000 BTU

This is one of the most unique low profile window AC units available. It’s innovative U-shape means the window sash lowers into the middle of it. You’ll never be concerned about the AC unit falling out because the window will hold it securely in place.

The WiFi functionality of this Midea AC unit allows you to control everything from the Android/iOS app. So, rather than have the AC running all day and wasting energy, you can use the app to lower the temperature before leaving for work, and the room will be cool when you arrive.

The unit also works with Alexa.

Did you know? The Midea U Inverter window AC is also available in 10000 and 12000 BTU models, so there’s a size for most rooms in your home, and they all have the same unique design and great functionality. Choose the link below, and select the size or sizes you want.

Midea U

Height and Width: 13.5 x 22 Inches

Window Size: Widths from 22-36 inches and height at least 13.75 inches

Pros: There is a lot more to like about this u-shaped AC. It is Energy Star rated due to its inverter compressor that runs evenly, rather than shifting from low to high and back again. The WiFi function will prove quite useful. This is the quietest small AC unit on this list at just 42 decibels. For extra support, an installation bracket is included.

Cons: Make sure the unit is properly tilted toward the outside to ensure that the condensation it collects is drained rather than pooling on the window sill.

Bottom Line: If you like quality, high-performance equipment, this Midea U Inverter window air conditioner is a top choice.

#9 hOmeLabs 8,000 BTU

This brand has made a name for itself with excellent quality and a quirky spelling of its name. The hOmeLabs 8000 BTU AC is digital for easy setting and precise temperature control.

hOmeLabs 8,000 BTU

Height and Width: 13.3 x 18.6 Inches

Window Size: Widths from 23-36 inches and height at least 13.75 inches

Pros: Fully digital with a 24-hour timer and remote control. These conveniences allow you to keep your room as comfortable as you like while reducing energy use. It will cut your energy costs with its Energy Star energy efficiency and ECO plus Sleep modes.

Cons: The Seller has had past issues on slow returns on damaged products, but the problem seems to be resolved.

Bottom Line: The Homelabs brand is known for quality and dependability at a fair price. About 90% of verified buyers would purchase this unit again.

#10 TaoTronics TT-AC001 Window Air Conditioner 10,000 BTU

TaoTronics is an up-and-coming brand offering quality products for you home. We put this model on our best smallest window air conditioners list because it delivers dependability and all the features you can expect from a window AC unit.

TaoTronics TT-AC001

Height and Width: 15.7 x 21.5 Inches

Window Size: Widths from 23-36 inches and height at least 16 inches

Pros: This window air conditioner produces a lot of cool air – meaning it removes heat from your room or zone very quickly. Turn it on, as you should do with any room AC, before the heat gets too high, and it will keep the area cool and dry. This TaoTronics AC has all the remote/timer/mode features you’ll enjoy in a window air conditioner.

Cons: The majority of the complaints about this model are that it arrives damaged from the seller (Amazon) or that it won’t cool a huge area. Just keep in mind that it is rated for up to 450 square feet. If the room faces south or west, remember to turn on the AC before the room gets overheated. This is a pro tip for the use of any room air conditioner.

Bottom Line: This is an Energy Star certified window AC unit that will keep your room or zone very comfortable by lowering the temperature and removing humidity from the air. It’s fairly quiet too, about average for window air conditioners.

#11 Frigidaire Energy Star 12,000 BTU

This is one of the most efficient window AC units available. It is Energy Star rated for lower electric costs. And it has all the features you might want in a window air conditioner – Remote with all the functions, 24-hour timer, washable filter and excellent humidity control – when the air is drier, it is more comfortable.

Frigidaire Energy Star

Height and Width: 14 x 21 Inches

Window Size: Widths from 23-36 inches and height at least 15 inches

Pros: Save on energy bills and enjoy all the AC features you want.

Cons: Check the price. It’s very competitive for what this window air conditioner offers. And with Energy Star efficiency, you’ll save money and pay back the cost very quickly. 

Bottom Line: This compact window air conditioner offers powerful, energy efficient cooling in a large room plus all the convenience features like a remote and timer.

Proper Window Sizing is Essential

Some consumers choose the smallest window air conditioner they can find only to be disappointed in its performance.

It’s important that the AC be properly sized for the space.

Problems with an Undersized Window AC

It’s not a mystery. If the unit is too small for the room, you will have three problems.

1. It won’t have the cooling power to remove enough heat. You’ll be uncomfortably warm.

2. Window ACs remove humidity too. If the unit is too small, the room will remain muggy.

3. The AC will run way more than it should trying to keep up, and this will be loud and lead to early mechanical failure.

That all adds up to wasted money.

If small windows are a problem, but the room is large, there’s a solution.

Ductless mini split air conditioners are designed for rooms not served by central air conditioning and where a window AC won’t do the job.

See our complete Guide to Central Air Conditioning vs. Ductless AC/Mini Split AC.

Back to window air conditioners, the chart below was developed by the Energy Star agency.

Area To Be Cooled (square feet)

Capacity Needed (BTUs per hour)

100 up to 150

150 up to 250

250 up to 300


300 up to 350

350 up to 400


400 up to 450

450 up to 550

550 up to 700

700 up to 1,000


1,000 up to 1,200


1,200 up to 1,400


1,400 up to 1,500


1,500 up to 2,000


2,000 up to 2,500


It’s a good basic guide. However, when rooms are cooler or hotter due to the house layout and other factors, size should be adjusted.

Energy Star advises adjusting for room features:

  • For heavily shaded parts of your home, reduce AC capacity by 10%
  • For sunny parts of your home, increase AC capacity by 10%
  • Add 600 BTUs for each additional person that typically occupies the room
  • Add 4,000 BTUs of capacity if AC will cool a kitchen

Let’s say you have a 12x18 bedroom, so 216 square feet.

That falls between a 6,000 and an 8,000 BTU model, since very few 7,000 BTU models are made.

If one person uses the bedroom and it is on the north side or in a shaded part of the house, then a 6K unit would be sufficient.

If two people sleep there, the room is upstairs and gets a lot of sun, then you would 1) add 600 BTU and 2) add 10% or about 700 BTU. The total would be 7,000 + 600 + 700 = 8,300 BTUs. The 8K BTU model would be the right choice.

Choosing the Best Small Window Air Conditioner

The best AC is the one that fits your needs like a glove.

We discussed sizing a window AC already.

Here are a few more buying tips. Decide using these points:

How much the window air conditioner gets used: If you occasionally need to turn it on, then a unit that isn’t very efficient can save you money on equipment. See the tables above for units that do not meet Energy Star efficiency such as the HomeLabs 5,000 and the Frigidaire FFRA0611R1.

If you need to use the AC often, then it makes sense to pay a bit more for an Energy Star model from the list that is the right size for your space.

As you can see, there are Energy Star models at 5K, 8K, 10K and 12K BTUs. That covers rooms from about 150 to 450 square feet.

How important features are to you: If you turn the AC on when you want it and turn it off when you leave, then a simple mechanically controlled window unit will be fine. They’re low-tech and affordable. The disadvantage will be having to wait for the space to cool off.

When you think you’d use a 24-hour timer to program when the unit runs and would like a remote, then consider paying for one of the digital window units on the smallest window AC list. When used properly, you can cut energy use and cost and still enjoy cool air when you arrive home or enter the room.

PS: Portable ac units and Evaporative coolers are more and more popular for cooling small rooms in mild climates. You can also check our Best Evaporative Cooler Reviews and Small Portable ACs for more info.

If you don’t find the information here that you’re looking for, then it will likely be available in our other in-depth Window AC Reviews:

3 thoughts on “Top 11 Smallest Window Air Conditioners for Small Room”

  1. The window widths you give for each unit is 23-26 inches even when the model width is smaller then 23″. I want to get an A/C for a window that is divided down the middle so each half is only 19 inches wide. Would an A/C that is under 19 inches wide fit in my window ?


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