5 Smallest Air Conditioners

We've found 5 of the tiniest AC units on the market. See how they compare and which one is right for you with our reviews and buyer's guide. We make choosing a micro air conditioner a simple task.

small air conditioner

There are many people these days that want an efficient air conditioner but do not want a unit that is bulky and take up lots of room.

By choosing a tiny air conditioner, you can enjoy the best of both worlds with a comfortable indoor climate from a compact machine that won’t take up lots of valuable space.

A mini AC unit provides an affordable solution to cooling even the smallest areas and homes.

But, it can be a struggle to decide which of these micro air conditioner units are going to be right for your home. Fortunately, we have created this guide to help you make a more informed choice. We have reviewed five of the smallest  air con units to help you find one that suits your needs perfectly.

In addition, you can use our buyer’s guide to help you make that decision and purchase the ideal small AC unit for your home.

Whether you are looking for a mini window air conditioner or a compact split air conditioner and heating pump, we can help you to make the right choice with minimal stress and hassle.    

Some of the links below are affiliate links, meaning, at no additional cost to you, we may make a commission if you click through and make a purchase.

The Top Models Compared

See how the top tiny air conditioners compare in the table below.

There's a key under the table that explains the details.



Pioneer WYS012-17 Air Conditioner Mini Split Air Conditioner


Pioneer WYS012-17 Mini Split Air Conditioner

Price: $$

Type: Cools & Heats

SEER 17.2


Indoor Size: 31.5 x 7.3 x 11.6 

Outdoor Size: 30.3 x 11.8 x 21.8

Room Size: 350-450 ft2

Warranty: 2 years parts, 5 years compressor

Senville SENL-09CD 9000 BTU 15 SEER Split Air Conditioner and Heat Pump

Senville SENL-09CD Mini Split

Price: $$

Type: Cools & Heats



Indoor Size: 31.7 x 7.6 x 11.2 

Outdoor Size: 30.3 x 11.8 x 21.8

Room Size: 350-450 ft2

Warranty: 2 years parts, 5 years compressor

Senville 9000 BTU Split Mini Air Conditioner and Heat Pump

Most Energy Efficient

Senville SENA 12HF-Z Mini Split

Price: $$$

Type: Cools & Heats

SEER 19.5 - 22.5

10.6 - 12 HSPF

Indoor Size: 32.8 x 7.8 x 11

Outdoor Size: 31.5 x 13.1 x 21.8

Room Size: 350-450 ft2

Warranty: 2 years parts, 7 years compressor

Frigidaire FFRA0511R1 5000 BTU Window Mounted Mini Compact Air Conditioner

The Smallest

Frigidaire FFRA0511R1 Compact Window AC

Price: $

Type: Only Cools

SEER 11.1

Total Size: 16 x 15.2 x 12

Room Size: up to 150 ft2

Warranty: 2 years

HomeLabs 5000 BTU Window Mounted Air Conditioner

HomeLabs Window Mounted Air Conditioner

Price: $

Type: Only Cools

SEER 11.1

Total Size: 16 x 15.4 x 12

Room Size: up to 150 ft2

Warranty: 2 years

Table Key:

SEER stands for Seasonal Energy Efficiency Ratio. This is a measure of how energy efficient the unit is. The higher the value the better.

HSPF stands for Heating Seasonal Performance Factor. This is a measure of how efficiently a system can provide heat. The larger this value the better. 

Room size shows how big a room the AC unit is suitable for.

The sizes are measured in inches and are in the order width x depth x height.

You can learn more about some of these statistics in our buyer's guide further down the page.

The Smallest Air Conditioners Reviewed

In this section, we take a close look at the performance of each model. See exactly what we think of each of them and which one is the best fit for your home.

Pioneer WYS012-17 Mini Split Air Conditioner  *** Our Top Pick ***

If you are looking for a mini split system air conditioner and heat pump, this could be the perfect choice for you. This is an inverter and ductless wall mount AC that offers 12,000 BTU of heating power. There are various options available when it comes to this model, with some offering up to 36,000 BTU and 240V. If you are looking for something that is cost effective to run and can be used all year around, this could be the ideal option.

For those that want the smallest mini split AC for their home or office, this is a great choice because of its compact size. In addition to its small size it also offers superb efficiency with its modern design. At 17.2 SEER cooling efficiency and 9 HSPF heating efficiency it offers some of the best numbers on the market. This makes it an excellent choice for those that want their energy bills to be lower. In addition, it is ETL safety tested and approved for your peace of mind and protection.

Besides the remote control, this device can also controlled by a smartphone app. You can now easily change the temperature wirelessly from anywhere in the house. 

Another thing to note is that this air conditioning unit has hundreds of excellent reviews from other customers, which means that you can make your purchase with total confidence and peace of mind. You can learn more about the product itself from these reviews, as well as its effectiveness, efficiency, ease of use, and value for money. This will then enable you to make an informed choice as to whether it is the right option for you.

This AC unit comes with a complete 16’ installation kit, a ductless section for indoors, a heat pump for outdoors, and the LCD wireless remote for your convenience. It is cloud programmable and ideal for those that want to turn their home into a smart home. There are four modes that you can choose from in total, which includes heating, cooling, dehumidifying and ventilating. This makes it a very versatile unit for any home.

In addition to the quality of the air conditioner, you can also look forward to excellent service and support from the manufacturer. The hotline covers all aspects of your AC unit, from the installation and use through to dealing with any other problems, parts, and warranty. Whatever assistance you need with your unit, there are always professional on hand to help, which provides you with greater reassurance.

In all, this system is a great addition to your home, as it provides practicality, versatility, ease of use, and modern design. You can also use if throughout the year to either cool or warm your home, which adds to its versatility.

  The Final Verdict: A great choice of mini air conditioner for those that want versatility and an AC that can be used throughout the whole year for creating a comfortable temperature.

Senville SENL-09CD Mini Split

When it comes to finding the smallest mini split AC, you won’t go far wrong with this model from Senville. It comes at an affordable price and offers efficiency and ease of use as well as being a split system that you can use all year round. With plenty of excellent reviews from other customers, you can benefit from total peace of mind and confidence when you choose this unit for your home.

With this air conditioner, you can benefit from the versatility of a mini split ductless air conditioner and heater. This is a 16 SEER unit and the invertor compressor is manufactured by the world renown brand, Toshiba. Another key benefit you can look forward to when you purchase this air conditioning units is a five-year warranty, which will provide you with a greater level of protection and peace of mind in the event that anything should go awry.

 This is a low ambient kit which enables you to heat up or cool down your room in temperatures as low as -5F. It comes with an easy to install kit that will make it simple to set up and get started. It also boasts Whisper Technology for super quiet operation. This means it is ideal for rooms where you don’t want noise and disturbance, such as your bedroom.

The design of the AC unit is sleek and modern, and because it is a mini system it is also extremely compact. This makes it ideal for smaller homes and offices as well as for those that do not wish to have a huge AC unit taking up space in their property. With this unit, you can look forward to powerful performance and ease of control, which makes it quick and convenient to get your rooms to the perfect temperature in both the colder and warmer seasons.

With this system, you can enjoy an affordable and efficient way of heating and cooling your home or office. Included in the kit is the indoor air handler, the outdoor condenser, the 16 ft installation kit, and an infrared remote control for convenience and ease. It is the perfect choice for all sorts of rooms and settings ranging from single rooms to garages and commercial premises. You can look forward to controlling the climate with ease and convenience without spending a fortune.

Having this AC unit in your home or office will make it far more comfortable for everyone in the property. You can wave goodbye to stifling summer heat and freezing winter chills simply by using this stylish and practical split unit to maintain the ideal temperature in your home or business premises.

  The Final Verdict: This AC unit is an excellent choice for those that are looking for an affordable option that also offers practicality and versatility.

SENA 12HF-Z Mini Split   * Most Energy Efficient *

This split mini air conditioner from Senville does come at a higher price point that some of the others on our list. However, it is very well designed and robust with a range of excellent features and benefits. If you are looking for a stylish AC unit that not only offers powerful performance but also valuable features, this could be the ideal option for you. It also comes with an easy installation kit with a 16 feet copper line set.

This unit comes with DC Inverter technology, which means that you can look forward to excellent efficiency levels as well as powerful performance. The SEER and HSPF ratings of 19.5 - 22.5 and 10.6 - 12 depend on the type of coil used upon installation. However, even the lower end of the range is extremely impressive. This is the most energy efficient AC unit on our list, but it is also the most expensive and the largest.

The great design of this AC means that you can also enjoy an attractive and aesthetically pleasing appearance. The unit is small and compact, which means that it won’t take up a lot of space. The air conditioner is also ETL Intertek approved, AHRI Certified, and Energy Star Certified. This means that you can look forward to the energy saving benefits of this unit, which is ideal if you want to keep your energy bills down.

In addition to this, you also get to benefit from the Whisper Technology that is used in this system. This makes it easy to benefit from quiet operation, so you won’t be disturbed by the system when it is in use. The mini size of the system means that it won’t look obvious and make your property look like an eye-sore. This is another bonus that comes with choosing a mini split system such as this one.

Another thing to bear in mind is that you get a 2-year warranty on parts with this system. In addition, you get to benefit from 7-year warranty on the compressor. This is the best warranty of all our recommended small AC units.

  The Final Verdict: The most energy efficient air conditioner on our list. However, it's also a bit bigger than the rest and also the most expensive.

Frigidaire FFRA0511R1 Compact Window AC  * The Smallest Window AC*

For those that are keen to find a high-quality small window conditioner from a reputable manufacturer, this is a solid choice. The system comes at a very affordable price, which makes it ideal for those who are on a tight budget. In addition, its compact size and design makes it ideal for smaller spaces and properties. The window mounting kit is included with this unit, so you should have no problem getting it installed.

Finding the smallest window air conditioner is not always easy but you will be delighted with the compact size and modern design of this one. This is a 5,000 BTU air conditioner that uses a standard power outlet for operation. It is able to cool a room of up to 150 square feet with speed and ease. It also offers 1.1 pints per hour when it comes to dehumidification. This makes it easy for you to achieve the perfect temperature during the warmer months.

This unit comes with a range of features, which makes it a versatile and practical choice for your property. It has mechanical rotary controls, two speeds for cooling, two fan speeds, and two-way airflow for increased effectiveness. It is ideal for windows that are 23-36 inches in terms of width. You should make sure you measure your window before you make your purchase to ensure it will fit properly.

With its low power start-up, this is a unit that is also efficient in terms of energy, so you don’t have to worry about spending a fortune on bills. It boasts very quiet and smooth operation, so you also don’t need to worry about excessive noise when you are using the unit. You can restart the air conditioner without any hassle and you can enjoy clean, cool air whenever you need it. This is the ideal way to create a comfortable climate in your home.

Thanks to the mechanical rotary controls that come with this unit, you can look forward to total ease of use and greater control. You can manage the fan and cooling speeds effortlessly. In addition, you can direct the air where you want to feel it the most thanks to the two-way air flow system that comes with this unit. Installation of the unit is very simple, and you will receive everything you need to get it installed.

If you want an air conditioning unit that offers affordability, efficiency, and great performance, this is a great unit to choose. Because it is a tiny window air conditioner compared to full size ones, you don’t have to worry about creating an eyesore. Instead, you can simply enjoy the cooling effects that the unit offers, which will provide welcome relief during the warmer months when temperatures can get unbearable indoors.

  The Final Verdict: If you are on budget and you are looking for a small window air conditioner, this is a good choice. It is the smallest air conditioner on the list when it comes to overall size, but you will need a window to install it.

Recommended Article: Make sure to check out our guide to the quietest AC units next!

HomeLabs Window Mounted Air Conditioner

This window AC is ideal for smaller rooms and properties. It is suited to rooms that are up to 150 square feet in size. It comes with all of the fixtures and fitting required to install it with ease and convenience. You should always plug this into a standard power outlet rather than using an extension lead. This is a great unit for a wide range of single rooms or for small apartments that can get very hot in the summer months.

You will find an impressive seven temperature setting that you can use with this mini air conditioner. This means that you can control the temperature with greater ease and create the perfect climate indoors. There are also two fan speeds that you can choose from as well as two-way airflow direction, so you can direct the cool air to where you want it the most. It works very quickly and can cool down small rooms in less than 15 minutes.

In addition to the superfast cooling capabilities of this unit, you can also look forward to very quiet operation. This means you won’t have to worry about being disturbed by noise from the unit when you are using it so it ideal for small bedrooms and living rooms. The air conditioner is ideal for windows that are 23-36 inches in width. You should always ensure you measure your windows before you make your purchase to make sure the unit will be suitable.

Another thing you get when you choose this window air conditioner is a reusable eco filter, which is easy and convenient to maintain. This antibacterial filter can simply be washed with soap and warm water or cleaned with a hand vacuum. If you wash it, you need to make sure that it dries out properly before you put it back into the unit. By making sure your filter is regularly cleaned, you can look forward to maximum performance from your air conditioning unit.

This is an air conditioning unit that is also ideal for RVs, so if you enjoy heading out on RV trips with your family and friends, this provides the perfect way to enjoy increased comfort while inside the vehicle. All in all, this is a very versatile little unit that comes at a great price and offers a wide range of useful features for your comfort and convenience.

  The Final Verdict: If you want an air conditioning system that can be easily installed, comes at a low price, and offers some great features, you cannot go wrong with this one. It's also really small and only a matter of fractions bigger than the smallest AC unit on this list.


With the wide range of miniature air conditioner units on the market, it is easy to see why some people struggle to make their choice. All of the air conditioner units on our list offer a variety of features and benefits to ensure your home or office environment is far more comfortable. Some are more advanced than others and, therefore, they come at a higher price. However, they also offer more features and as cooling and heating capabilities.

When it comes to a split system, our choice would have to be the Pioneer WYS012-17 Mini Split Air Conditioner. You can benefit from having a split air conditioner that you can use all year around. However, the price is much lower than some of the other similar systems. It offers a variety of features and benefits that can help you to achieve the perfect temperature at your home of office.

It's not the smallest AC unit on our list but it is the smallest mini split system. It offers a great combination of energy efficiency, features, and size. The true "all-rounder".

If you are looking for the tiniest window air conditioner, the one we would recommend is the Frigidaire FFRA0511R1 Compact Window AC. Again, this is a very affordable option and it offers the ideal way to cool small spaces and rooms. It also offers very quiet operation and can be installed with ease. Also, with a choice of temperature settings, you can control the temperature in your room with far greater ease.

Of course, you have to take other factors into consideration as well when you are making your choice. This includes things such as the size and design of the air conditioner as well as any unique features, warranty and various other factors. This will make it easier for you to make the right decision when choosing a mini air conditioner for your home or place of business. You can then enjoy the ability to be comfortable and relaxed with the perfect climate.

small AC unit

Buyer’s Guide

We all want to be sure we are making the right choice when purchasing products such as an air conditioning system. However, this is not always easy particularly if you cannot get word of mouth recommendation. Of course, you can look at reviews online to see what others think but you also need to know what considerations are important in order to help you choose the ideal air conditioning unit for your home of business premises.

Our buyer’s guide is designed to help you to do this, which means that you can benefit from greater peace of mind and reassurance when you make this type of purchase. In addition, you can boost your chances of finding the ideal small air conditioner for your needs, as you will know what to look for and how to compare different options.

The Cost of the Unit

One of the things that will be a key consideration for most people is how much they have to pay for their compact air conditioner. As you can see from the above list, the prices vary quite widely depending on the type, make, and model of the unit. This is why it is important to compare the different options and work out what is affordable and suitable for your needs, so you can make the right choice. You can then enjoy the comfort of an AC without spending over the odds.

Before you start searching for the right small air conditioner, you should take some time to work out your budget and determine the maximum amount you are realistically able to afford. This will help to streamline the process for you as you can focus on the models that fall within your price range rather than wasting your time looking at units that you cannot afford. However, it is important to make sure you do not base your decision solely on the cost of the unit.

Air conditioner system

The BTU Output and Cooling Power

Another thing you need to consider is the BTU output of the units you are interested in. This can vary from one unit to another and it can affect the effectiveness of the unit. It is therefore important to make sure you check this when you are deciding which compact air conditioner is going to be right for your home. You should also look at factors such as the voltage used and the energy efficiency of the unit before you make your choice (see the next section).

The BTU output is important as it represents the overall cooling power of the unit. However, it doesn't take into consideration the energy efficiency. 

It is also vital to remember that AC units are able to cool spaces of specific sizes. With this in mind, you need to measure the space that you plan to use the unit in, so you can determine whether the unit you are interested in is powerful enough to cool a space of that size. This will help to ensure you choose the right unit for the space of your room.

Energy Efficiency

The energy efficiency of AC units is represented by a SEER rating. The Seasonal Energy Efficiency Ratio is the cooling output over a whole season divided by the energy consumption in Watt-Hours.

This value is calculated using a constant indoor temperature over the course of a cooling season. The outdoor temperature is varied to simulate "real life" conditions.

Modern air conditioner units range from 13 to 25 SEER and some states require a minimum SEER value. For example, California requires SEER 14.

The higher the SEER value the better and the more efficiently your unit will run. Just remember these are maximum values and your AC won't always run at the SEER value.

For units that also provide heat, they are rated using the HSPF (Heating Seasonal Performance Factor). Again, the higher this value is, the more efficiently it provides heat for a room. HSPF is the ratio of BTU heating output and Watt-Hours of energy used over the course of a heating season.

A split system that cools and heats will have both of these values, HSPF and SEER.

energy efficiency at home
The Features and Specifications of the Unit

It is very important to look at the features and specification of the different air conditioner units you are interested in. This will enable you to make an informed choice about the unit you choose for your home or business premises. There are various features and specifications that you need to look at depending on what you are looking for from your air conditioning unit. All of the ones on our list have their own unique features.

Taking the time to look at the features and specifications of the different units will make it much easier for you to see which of the products is suited to your property and your specific needs. For instance, you may be looking for a split AC unit or you may want a window one. You may be interested in ease of use of the control panel or whether it can be controlled wirelessly. Looking at the features will enable you to see exactly what each unit has to offer.

We've got multiple guides to AC maintenance here at Tiny House, Huge Ideas. Find out how to clean filters properly here.

The Size and Dimensions of the AC

If you are looking for an air conditioner that is compact, you naturally need to check the size and dimensions of the units before you make your choice. This will help to ensure that it is well suited to your space and your home. The size of the ACs on our list vary but they all fall under the categories of compact or mini air conditioning systems. Of course, there are other smaller units that you can choose from as well, so finding the right one won’t be an issue.

If you want to ensure you have the right sized air conditioner for your home or place of business, it is important to compare the dimensions of different units, so you can find one that suits your needs in terms of the size. You can then ensure you get the ideal size for your property. Make sure you know the correct measurements of the area you will be placing your air conditioner, so you can ensure it fits properly.

Different types of electric cooling devices

The Window Width Capacity

There are many people that prefer having a window air conditioner, as these are cheaper and also ideal for smaller spaces. You can choose from a wide range of window air conditioners and they are easy to install and plug in to regular power outlets, which is an added bonus for many. However, you need to ensure that the unit you buy will be suitable for the size of your window, so this is something you need to check.

Before purchasing a window air conditioner, you need to make sure you measure the width of your window, which is what will make the difference. You can then check to see what window widths each of the air conditioners is suited to, so you don’t end up with one that will not fit your window width.

Consumer Reviews Online

In today’s digital age, consumer reviews have become hugely useful and many people get online to look at consumer reviews before they make big purchases. This is something that is well worth doing before you make a firm decision on which air conditioner to purchase. You will find many consumer reviews available online and you can benefit from having access to unbiased and honest opinions from those that have already tried and tested the unit you are considering buying.

By looking at online consumer reviews, you can enjoy the next best thing to a personal recommendation when it comes to finding the right air conditioner. You will be able to learn more about what other customers thought about the quality of the AC unit, its effectiveness and efficiency, its energy usage, and the ease of use. This will make it far easier for you to decide which air conditioner to choose.

Cleaning Air Conditioner filters

The Manufacturer of the AC

As you can see from our list, there are various manufacturers that make these compact AC units. While all of the manufacturers on our list are reputable ones, it is important that you check on the reputation of the company before you make a purchase. You want to ensure that you buy an air conditioner that is safe, effective, and affordable. However, you also want to ensure you find a manufacturer that provides good levels of service and has a solid reputation.

One of the things you can do if you want to check on the reputation of any manufacturer you are not familiar with is turn to consumer reviews again. You will find reviews online about all sorts of companies so finding a selection about the manufacturer of the AC you are interested in shouldn’t be an issue. This then provides you with additional peace of mind and enables you to learn more about the manufacturer through unbiased opinions based on experience.

The Design and Style of the Unit

You may want to purchase a small air conditioner for your home or office, but you also need to take the design and style into consideration before you make your choice. The appearance and style of the various air conditioners varies so you need to look at this to ensure you get one that fits in with personal tastes.

In terms of the style, you can get different types of air conditioners. Some are window air conditioner units while others are split units with an indoor and outdoor section. You need to work out which of these will work best for you and you can then choose the most suitable air conditioner for your individual needs as well as your budget.

window air conditioner unit
Ease of Use and Installation

When you have something such as an air conditioner, you don’t want to have to jump through hoops to get it set up or use it. This is why it is important to make sure you look at the ease of use and the installation process for the different units. Some air conditioners such as the split systems ones may require a professional to come out and install whereas the window air conditioners are designed to be easy to install.

When it comes to ease of use, you should check how the control work, whether it can be used wirelessly, and whether there is a remote control. You will also find out more about ease of use when you check the various consumer reviews online. 

Check out our guide to window AC installation.

The Warranty Offered

Finally, you should check to see what sort of warranty is offered with the air conditioning unit you purchase. If something goes wrong, you naturally want the problem ironed out so having a warranty in place is important. The length of the warranty can vary from one AC to another, so this is something you need to double check. You can then benefit from increased peace of mind and protection in the event of any issues arising.

AC warranties are usually a bit strange. You're usually offered one warranty for the compressor and one for the labor and parts of the internal unit.

By considering the above points when you are searching for your air conditioning unit, you will find it easier to know what to look for and to make an informed choice. This type of unit can be a big investment, particularly if you are purchasing one of the more expensive split air conditioner systems with heat pumps. You therefore want to make sure you make the right decision before you finalize your purchase.

Once you have found the right compact AC for your home, you can look forward to total comfort. You can create just the right environment and climate in the chosen room or space, which means you will find it easier to relax or work depending on where you plan to use the unit.

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