small air conditioners that can cool down 10x10 room 12x12 room and 14x14 room

8 Smallest Air Conditioners For Small Room (10×10, 12×12, 14×14)

So many people face this problem: “I have a small 12 x 12 room, how many BTU air conditioner do I need?” For small rooms, even the smallest 3,000 BTU air conditioner would suffice.

However, when you check the window and portable air conditioner, you realize that most of them have 8,000 BTU to 15,000 BTU cooling capacity. They adequately cool 400 sq ft (20 x 20) to 750 sq ft (28 x 28) rooms but for small 10 x 10, 12 x 12, or 14 x 14 rooms they are quite an overkill. 

Obviously, it’s not advised to buy a normal-sized AC unit that will drain twice as much energy as you need and will be twice as big as the smallest unit. Naturally, the smartest way to cool down a small room is to buy the smallest air conditioner possible. That is the US Department Of Energy directive, and it does make a lot of sense.

There are 3 kinds of very small air conditioners on the market:

  1. Small 5,000 BTU window AC units. These are cheap, tiny, but are fixed on the window sill.
  2. Smallest 8,000 BTU portable AC units. Costlier but they can be moved from room to room with ease.
  3. Battery-powered air conditioners. The best one is Zero Breeze Mark 2 with only 2300 BTU. It’s expensive but can be used to cool down a 10 x 10 room, a tent, an RV and so on.

Example: A small 10 x 10 room requires a 2,000 BTU unit. You can choose between the smallest 5,000 BTU window air conditioner, 8,000 BTU portable AC unit, or 2,300 BTU battery-powered unit. In terms of BTU capacity, the Zero Breeze Mark 2 with 2,300 BTU would be the most appropriate choice (and you can even take it with you on camping). Here are the best choices summarized:

#1 Smallest Window AC Unit#1 Smallest Portable AC Unit#1 Smallest Battery-Powered AC Unit
Frigidaire FFRA051ZA1
Honeywell MO08CESWB
Zero Breeze Mark 2 (Tesla of AC units)
Capacity: 5,000 BTUCapacity: 8,000 BTUCapacity: 2,300 BTU
Room Size: 100 to 250 sq ftRoom Size: 150 to 300 sq ftRoom Size: 50 to 115 sq ft
$$$$
4.2 out of 5 stars
Check on Amazon
$$$$
3.9 out of 5 stars
Check on Amazon
$$$$
4.8 out of 5 stars
Check on Zero Breeze

Note: Small air conditioners with low BTU capacity can cool down a small bedroom or living room but are not appropriate for a kitchen. HVAC experts always recommend installing an AC unit with 4,000 BTU extra capacity for a kitchen; that’s because the kitchen tends to be hotter (baking, cooking, kitchen appliances, and so on).

We gathered all the best smallest air conditioners in the table below. Apart from the extremely low BTU capacity, the noise levels, the small size of the units, price, and energy-efficiency were taken into account. 

Below the table, you’ll find a review of each small AC unit featured in the table. The air conditioner type (window, portable, battery-powered) is also noted for your convenience.

Very Small Air Conditioners For Small Room (Up To 300 Sq Ft)

Small Window AC:Photo:Important Metrics:Rating And Price:
#1 Frigidaire 5,000 BTU White FFRA051ZA1
(Most Popular Small Window Unit)
Capacity: 5,000 BTU
Room Size: 100 to 250 sq ft
Dimensions (WxDxH):
16 1/16 x 16 7/32 x 11 7/8 inches
Power: 450 W (4 A, 115 V)
Weight: 39.7 lbs
$$$$
4.2 out of 5 stars
Check on Amazon
#2 MIDEA 5,000 BTU MAW05M1BWT
(Cheap Small Window Air Conditioner Unit)
Capacity: 5,000 BTU
Room Size: 100 to 250 sq ft
Dimensions (WxDxH):
15.98 x 13.19 x 12.05 inches
Power: 537 W (5.04 A, 115 V)
Weight: 42.9 lbs
$$$$
4.1 out of 5 stars
Check on Amazon
#3 LG 5,000 BTU LW5016
(Smallest LG Window Air Conditioner)
Capacity: 5,000 BTU
Room Size: 100 to 250 sq ft
Dimensions (WxDxH):
17.31 x 14.38 x 11.13 inches
Power: 440 W (4.1 A, 115 V)
Weight: 40.0 lbs
$$$$
3.9 out of 5 stars
Check on Amazon
#4 Frigidaire 5,000 BTU FFRA051WAE (Old School Compact Mechanical Air Conditioner)Capacity: 5,000 BTU
Room Size: 100 to 250 sq ft
Dimensions (WxDxH):
15.25 x 16 x 12 inches
Power: 450 W (4.9 A, 115 V)
Weight: 41.4 lbs
$$$$
4.1 out of 5 stars
Check on Amazon
Smallest Portable AC:Photo:Important Metrics:Rating And Price:
#1 Honeywell 8,000 BTU MO08CESWB Compact 3-in-1
(Best Small Portable Air Conditioner)
Capacity: 8,000 BTU
Room Size: 150 to 300 sq ft
Dimensions (WxDxH):
13.5 x 14.6 x 27.7 inches
Power: 700 W (6.3 A, 115 V)
Weight: 43.0 lbs
$$$$
3.9 out of 5 stars
Check on Amazon
#2 SereneLife 8,000 BTU SLPAC8 (Compact Small Portable AC Unit)Capacity: 8,000 BTU
Room Size: 150 to 300 sq ft
Dimensions (WxDxH):
13.8 x 14.6 x 27.2 inches
Power: 900 W (7.5 A, 120 V)
Weight: 53.0 lbs
$$$$
4.2 out of 5 stars
Check on Amazon
#3 BLACK+DECKER 8,000 BTU BPACT08WT (Classic Small Portable Air Conditioner)Capacity: 8,000 BTU
Room Size: 150 to 300 sq ft
Dimensions (WxDxH):
16.5 x 11.5 x 26 inches
Power: 950 W (8.3 A, 115 V)
Weight: 52.9 lbs
$$$$
4 out of 5 stars
Check on Amazon
Battery-Powered AC Unit:Photo:Important Metrics:Rating And Price:
#1 Zero Breeze Mark 2 2,300 BTU
(Revolutionary Cordless Pocket-Size Air Conditioner)
Capacity: 2,300 BTU
Room Size: 50 to 115 sq ft
Dimensions (WxDxH):
10 x 20 x 11 inches
Power: 650 W (27 A, 24 V)
Weight: 16.5 lbs
$$$$
4.8 out of 5 stars
Check on Zero Breeze

Smallest Window Air Conditioners (5,000 BTU Units)

Of all the small air conditioners, the window AC units are the most numerous. There is 1 small battery-powered AC unit, several portable ones but almost every company – from Frigidaire to LG – produces the smallest 5,000 BTU window air conditioners.

They have an above-average energy-efficiency with an EER rating of above 10 in several cases. Additionally, they are very quiet (noise levels up to 55 dB) and weigh only about 40 pounds. Small window AC units are powered by 115 V electrical grid that practically everybody has installed.

Here are the best smallest window air conditioners for small rooms:

#1 Frigidaire 5,000 BTU White FFRA051ZA1 (Most Popular Small Window Unit)

best smallest frigidaire window air conditioner
Cooling capacity:5,000 BTU
Recommended room size:100 to 250 sq ft
Dimensions (WxDxH in inches):16 1/16 x 16 7/32 x 11 7/8 
Power: 450 W (4 A, 115 V)
Energy-efficiency (EER rating):11.1 (High)
Weight:39.7 lbs

Frigidaire FFRA051ZA1 is the de facto choice for a small bedroom or living room. It is petite both in terms of BTU (5,000) and dimensions. It is the most reliable small window AC unit you can put in any small room with less than a total of 250 sq ft.

For a single room window air conditioner, it has all the necessary specs. The lowest possible BTU capacity for a small window unit and, what can be even more important, high energy-efficiency. It has a wattage of 450W; powered by 4 Amps and 115 V. In fact, the Frigidaire FFRA051ZA1 has an EER rating of 11.1 which puts it in a class of eco-friendly high-efficiency window AC units.

The dimensions are small as well. The width of 16 1/6 inches and a depth of 16 7/32 inches are standard for a 5,000 BTU unit. However, the height of 11 7/8 inches makes the Frigidaire FFRA051ZA1 one of the lowest window air conditioners. That’s especially useful if you don’t have high windows.

Weighing a little less than 40 pounds and with the maximum noise levels of 55 dB, it’s no wonder why the Frigidaire FFRA051ZA1 is the most popular choice of a very small air conditioner. In fact, it scores very high on the best window air conditioner table overall. You can get it for less than $250 which is quite a moderate price for such a reliable unit.

Frigidaire FFRA051ZA1

Pros
  • Most popular small 5,000 BTU window air conditioner
  • Very low height (11 7/8 inches)
  • High energy-efficiency (EER rating of 11.1)
  • Appropriate for a small bedroom or a small living room with up to 250 sq ft total area
  • Affordable price of about $250
Cons
  • Width and depth dimensions are both 16+ inches (quite big)
  • Might be an overkill for very small 10×10 rooms

#2 MIDEA 5,000 BTU MAW05M1BWT (Cheap Small Window Unit)

small midea air conditioner for a small bedroom
Cooling capacity:5,000 BTU
Recommended room size:100 to 250 sq ft
Dimensions (WxDxH in inches):15.98 x 13.19 x 12.05
Power: 537 W (5.04 A, 115 V)
Energy-efficiency (EER rating): 9.3 (Standard)
Weight:42.9 lbs

Midea is fast becoming one of the most popular brands. Their devices have one key advantage over the big players in small window air conditioners world – Frigidaire and LG – and that’s the low price. The smallest Midea MAW05M1BWT window AC unit, for example, can cost $50 less than the best small Frigidaire unit.

The small Midea MAW05M1BWT width is below 16”, depth is a bit more than 13”. Both of these dimensions are minuscule (which is great). Nonetheless, the height of this window AC unit is above 12” is a bit above average.

tiny midea air conditioner installed in a small room
MIDEA MAW05M1BWT installed in a small 12×12 bedroom. It’s more than enough to create a cool environment even during a heatwave.

For a small 5,000 BTU air conditioner, this is quite a powerful device. It can achieve 537 W; with 5.04 Amps and 115 V. That’s not ideal because it means that energy-efficiency is quite standard. The best smallest window AC units should have an EER rating 10 or more. The Midea has a standard 9.3 EER.

With 42.9 lbs, it is also a few pounds heavier than other petite window AC units. Nonetheless, the drawbacks of not-the-best energy-efficiency and higher weight are offset by the low price.

The price of 5,000 BTU Midea MAW05M1BWT is about $170. That makes it the cheapest small window air conditioner by several $10. This is the key selling point of this air conditioner for small rooms. 

Frigidaire FFRA051ZA1

Pros
  • Cheapest small window AC unit (costs less than $200)
  • Small width and depth dimensions (15.98” and 13.19” respectively)
  • Becoming more and more popular
  • Can cool down small rooms up to 250 sq ft
  • Truly unbeatable price (you can save up to $100)
Cons
  • It’s a big higher than other small window air conditioners
  • Doesn’t have an above-average energy-efficiency rating (EER = 9.3)
  • Is on the heavier side (42.9 lbs)

#3 LG 5,000 BTU LW5016 (Smallest LG Window Air Conditioner)

very small LG window air conditioner for small rooms
Cooling capacity:5,000 BTU
Recommended room size:100 to 250 sq ft
Dimensions (WxDxH in inches):17.31 x 14.38 x 11.13 
Power: 440 W (4.1 A, 115 V)
Energy-efficiency (EER rating):11.4 (High)
Weight:40.0 lbs

LG is one of the most reputable HVAC device makers. They are known to make super small window air conditioners as well. LG’s smallest window AC unit is LG LW5016. It can produce up to 5,000 BTU cooling capacity, is very thin and has record-high energy efficiency rating for such a small device.

With the 11.13 inch height, the LG LW5016 is the thinnest window AC unit on the market. As far as the dimensions of small window units are concerned, the height dimension is usually the most important. LG’s AC unit doesn’t have the smallest width (17.31”) nor the smallest depth (14.38”). Usually, these two dimensions are never a problem.

lg LW5016 installed on a window of a small bedroom
LG LW5016 installed on a window sill of a 14×14 master bedroom. 5,000 BTU and 11.4 EER rating are perfect for small rooms such as this.

The most important metric of the LG LW5016 is its energy efficiency. It is powered by only 440 W. If you calculate the EER rating, you can see it has a record-high 11.4 EER rating. This is very important when it comes to the long-term cost-efficiency of a small window AC unit. The whole point of getting a small air conditioner for a small bedroom or living room is not to unnecessarily boost the electricity bill. The small 5,000 BTU capacity and 11.4 EER rating are perfect specs you want from any small unit.

All in all, LG has always produced reliable devices at an affordable price. Their smallest window AC unit – the LW5016 model – is exactly that.

LG LW5016

Pros
  • LG is the most reliable brand in HVAC
  • Highest energy-efficiency (EER rating is 11.4)
  • Thinnest window air conditioner with only 11.13 height
  • LG offers fair prices; usually below $200
Cons
  • Wider than other small units (17”+)
  • Rather popular but has only average rating on Amazon

#4 Frigidaire 5,000 BTU FFRA051WAE (Old School Compact Mechanical Air Conditioner)

Frigidaire FFRA051WAE reliable petite air conditioner
Cooling capacity:5,000 BTU
Recommended room size:100 to 250 sq ft
Dimensions (WxDxH in inches):15.25 x 16 x 12
Power: 450 W (4.9 A, 115 V)
Energy-efficiency (EER rating):11.1 (High)
Weight:41.4 lbs

One of the most well-known old-school small AC units is the Frigidaire FFRA051WAE model. Frigidaire is usually the #1 brand when it comes to smallest window air conditioners. The FFRA051WAE model is one of the earliest and most reliable model; it is simple, mechanical and, above all else, it has a great track record.

This compact Frigidaire has brilliant specs even according to 2020 standards. The high energy-efficiency of 11.11 EER is impressive. Despite being so small, this window AC unit can deliver 5,000 BTU cooling capacity while only drawing the maximum power of 450 W. 

The dimensions of the small Frigidaire FFRA051WAE are quite balanced. 15 1/4 inch width, 16-inch depth, and 12-inch height make this window unit not too big and not too small in all directions.

It does have more than 40 pounds, however. Luckily, that’s not such a problem with small window units; in portable units, that difference would be significant.

Frigidaire FFRA051WAE has a moderate price as most of the small window units. 

Frigidaire FFRA051WAE

Pros
  • Old-school reliable window AC
  • Well balanced dimensions (not too big in any direction)
  • High energy-efficiency (EER rating of 11.1)
  • Affordable price; it’s about $200 for some years now 
Cons
  • A bit heavier (41.4 lbs)
  • Older design (some people find it less appealing)

Smallest Portable Air Conditioners (8,000 BTU Units)

Above all else, portable air conditioners for small rooms are convenient. You don’t have to install them on the window of a small bedroom like window AC units, you can store them away during the winter and they can be easily moved from room to room (window units are pretty much fixed).

If you have several small rooms – 10×10 bedroom and 12×12 living room, for example – you can use a small room portable 8,000 BTU unit as:

  • Cooling device for the small 12×12 living room during the day.
  • Night cooling device for the small 10×10 bedroom during the day.

The two drawbacks of portable vs. window air conditioners for small room cooling are:

  1. Higher price of the portable unit (8,000 BTU portable units cost about $400 vs. $200 5,000 BTU window units).
  2. Lower energy-efficiency of portable units (EER rating of 10 or less).

Nonetheless, because the smallest portable AC units are far more convenient for small room cooling, they are commonly used instead of the window units. Here are the best and smallest portable air conditioners currently on the market:

#1 Honeywell 8,000 BTU MO08CESWB Compact 3-in-1 (Best Small Portable Air Conditioner)

smallest portable air conditioner by honeywell with 8000 btu capacity
Cooling capacity:8,000 BTU
Recommended room size:150 to 300 sq ft
Dimensions (WxDxH in inches):13.5 x 14.6 x 27.7
Power: 700 W (6.3 A, 115 V)
Energy-efficiency (EER rating):11.4 (Very High)
Weight:43.0 lbs

Honeywell MO08CESWB is hands down the best and simplest portable air conditioner you can get if you are looking to cool down a small room. Like all smallest portable AC units, it has 8,000 BTU, appropriate for small 150 to 300 sq ft bedroom or/and living room. 

Where the Honeywell MO08CESWB excels is the extremely high energy-efficiency and being lightweight. The Honeywell small portable AC is powered by 700 W and can produce 8,000 BTU; hence it has an EER rating of 11.4. Usually, portable units have a lower EER rating than window units (average EER rating for portable units is about 8.5). The fact that the EER rating of Honeywell MO08CESWB is above 10 is great in itself; at 11.4 EER it has the same energy-efficiency than the most energy-efficient small window AC units.

The other major advantage is the 43 lbs weight. Even the small portable units usually weight more than 50 pounds. Honeywell MO08CESWB is about 20% lighter than an average small portable air conditioner; it will be easier to install and to move around. If you’re looking to cool down a small living room during the day and a small bedroom during the night, you can move it very easily.

The Honeywell MO08CESWB can easily achieve the temperature range between 61°F to 89°F in a small room (with up to 300 sq ft). Honeywell also offers a very affordable price (below $400) which is quite a deal for such a tremendous device. There is no doubt that the Honeywell MO08CESWB is the best smallest portable air conditioner you can buy.

Honeywell MO08CESWB

Pros
  • My far the best and smallest portable AC unit for small rooms
  • Extremely high energy efficiency (EER rating of 11.4, with 8,000 BTU cooling capacity)
  • The lightest portable device; weighs only 43 pounds
  • Classic Honeywell’s affordable device
  • One of the most popular air conditioner in general (best-seller)
Cons
  • Is taller than most small portable AC units at 27.7” height
  • Cannot effective cool spaces above 300 sq ft

#2 SereneLife 8,000 BTU SLPAC8 (Compact Small Portable AC Unit)

very small portable air conditioner for small 12x12 rooms
Cooling capacity:8,000 BTU
Recommended room size:150 to 300 sq ft
Dimensions (WxDxH in inches):13.8 x 14.6 x 27.2
Power: 900 W (7.5 A, 120 V)
Energy-efficiency (EER rating):8.9 (Standard)
Weight:53.0 lbs

SereneLife SLPAC8 is one of the smallest portable air conditioners with 8,000 BTU cooling capacity. It can be moved around from a small room to another small room with ease. It has 3 operating modes; it serves as an air conditioner, as a dehumidifier, and as a fan.

With its 900 W it can achieve 290 CFM airflow; quite a lot for such a small device. However, as far as the cooling effect is concerned, the SereneLife SLPAC8 can deliver 8,000 BTU capacity. That means that the energy efficiency rating (EER) is 8.9. That is a standard EER rating for a small AC unit.

One consequence of the higher airflow is also higher noise levels. The SereneLife SLPAC8 noise levels can reach 57 dB which is not ideal. However, because of the high airflow, it can lower the temperature of a small room much quicker (practically in minutes). 

SereneLife SLPAC8 is small but not the smallest AC unit. It weights 53 lbs; you can move it around but you’ll likely break a sweat while doing it. However, compared to the Honeywell small AC unit, it’s cheaper. It costs only around $300.

SereneLife SLPAC8

Pros
  • Small portable AC unit with high airflow (290 CFM)
  • 3-in-1 modes: Air conditioner, dehumidifier, and fan
  • Very petite dimensions (compact unit)
  • Cheapest small portable air conditioner (costs about $300)
Cons
  • Only standard EER rating of 8.9 and standard weight of 53 lbs
  • Can produce 57 dB noise levels

#3 BLACK+DECKER 8,000 BTU BPACT08WT (Classic Small Portable Air Conditioner)

Cooling capacity:8,000 BTU
Recommended room size:150 to 300 sq ft
Dimensions (WxDxH in inches):16.5 x 11.5 x 26
Power: 950 W (8.3 A, 115 V)
Energy-efficiency (EER rating):8.4 (Standard)
Weight:52.9 lbs

BLACK+DECKER BPACT08WT is probably the most classic portable AC unit for a small room. It is one of the first 8,000 BTU units that have seen such an impressive sales record. The combination of affordable cost, reliability, and credible BLACK+DECKER brand makes this old-school device still one of the best smallest portable air conditioners.

If you look at the depth and height dimensions, you’ll see that this is a portable AC with the lowest height (only 26”) and with only 11.5” depth. It is broad, yes, measuring 16.5” from left to right. Nonetheless, if you put it in a corner, it will take the least amount of space possible.

The drawback that BLACK+DECKER BPACT08WT has energy efficiency. With 8.4 EER, you are wasting some 10% of the 950W of energy the small BLACK+DECKER BPACT08WT delivers. In long run, that can somewhat increase the costs of cooling down smaller rooms. 

This petite unit is still popular today; having a great track record of reliability is a big part of why people continue to the BLACK+DECKER BPACT08WT small portable AC.

BLACK+DECKER BPACT08WT

Pros
  • Classic old-school compact air conditioner
  • Low weight and very slim (26” height and 11.5” depth in total)
  • Great track record of reliability
  • Fixed price for the last couple of years
Cons
  • Is a bit heavy; weighs 52.9 lbs
  • Energy-efficiency rating EER is only 8.4

(Class Of Its Own) Zero Breeze Mark 2: Small Battery-Powered 2,300 BTU Unit

The Zero Breeze Mark 2 is really a class of its own. It’s the Tesla of air conditioners; fast, movable, battery-powered, and high tech. It uses advanced technology to bring you the ultimate convenience.

This is an air conditioner unit primarily designed for camping. However, given its 2300 BTU capacity, it can also be used to cool down very tiny rooms (up to 115 sq ft):

smallest battery powered air conditioner for very tiny rooms
Cooling capacity:2,300 BTU
Recommended room size:50 to 115 sq ft
Dimensions (WxDxH in inches):10 x 20 x 11
Power: 650 W (27 A, 24 V)
Energy-efficiency (EER rating):3.5
Weight:16.5 lbs

Being powered by battery has both advantages as well as disadvantages.

The main advantage, of course, is that you can move them from a tiny room to another tiny room with ease. It only weighs 16.5 lbs instead of 40 or 50 lbs like portable air conditioners. The dimensions are small; in fact, this is the smallest air conditioner by volume you’ll find.

With the immense 650 W power, it can lower the temperature in a small room or tent for up to 30ºF and it has decent airflow.

smallest battery powered air conditioner for very petite rooms

The disadvantage of the small battery-powered air conditioner is that it will have to run 27 Amps to ensure 650 W of power. You see, battery alignment delivers the grand total of 24 V of electric potential; that’s why you have to boost the Amps to get a powerful small air conditioner.

The energy efficiency and the fact that you have to power up the battery every 5 hours are the two big problems. Nobody really loves to constantly charge batteries; if you’re camping, that makes sense, but if you’re at home, you have the 115 V in the electrical outlet you can freely use. The 3.5 EER rating is abysmal; however, such low energy-efficiency is expected from a battery-powered device.

The aesthetics and the price are both unbeatable as well. You won’t find as good a looking petite air conditioner as Zero Breeze Mark 2. You also won’t find one that’s more expensive. The Zero Breeze Mark 2 may be beautiful and versatile but it can also cost up to $1,000.

All in all, Zero Breeze Mark 2 is the revolutionary smallest air conditioner on the market. With the 2,300 BTU, it’s the only one that really comes close to the BTU capacity of what a small 10×10 room would need (2,000 BTU, on average).

Zero Breeze Mark 2

Pros
  • Revolutionary battery-powered air conditioner
  • The smallest AC unit by volume and weight
  • With 2,300 BTU it’s perfect for the smallest 10×10 or even smaller rooms
  • Breathtaking aesthetics (people will be quite envious)
Cons
  • Primarily for camping
  • Energy-efficiency rating EER is only 3.5
  • Battery has to be recharged every 5 hours
  • Extravagant cost only high-end families can afford

Share Your Opinion Of The Smallest Air Conditioner

Feel welcome to share your experience or questions about how to cool down small rooms. Some people still use bigger 12,000 BTU devices for 10×10 rooms and don’t really know what size of an air conditioner do they need for a small room.

Others are worried that the smallest 5,000 BTU and 8,000 BTU air conditioners won’t be enough to adequately lower the temperature of 12×12 rooms.

Feel free to ask any questions that come to mind in the comments below.

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