11 Best Window Air Conditioner Brands On The Market

Window air conditioners are the best option for beating the heat without spending so much money on your electricity bills.

Central air conditioners are a common installation for many big homes, but they are not always the most affordable option if you want to cool specific zones. Since summer is soon approaching, we want you to take advantage of window ACs which are often overlooked.

However, going to an air conditioner shop is not a walk in the park. Many models and choices can be overwhelming unless you know what to look for. Which is why we have come up with a list of the best window air conditioner brands on the market.

Nobody wants to drop a large sum of money on a product that doesn’t live to its standards or breaks down frequently. It’s worse to have to keep calling for repair service. To avoid this, you need to buy tried and tested models—it helps if they are from reputable brands who have great experience manufacturing what you need.

Noise is one of the most common complains about window air conditioners. You need a model that does its job quietly. We took the trouble to rummage through hundreds of reviews from people who have purchased and used these air conditioners, and then critically analyzed what the brand manufacturers say about their products against what customers have to say.

We noted every product specification that most customers complain about and tossed out every ‘false’ pro. From the trusted Friedrich, Haier, GE, and Frigidaire, to other little known about but excellent brands…this list will help you buy the right window air conditioner.

11 Best Window Air Conditioner Brands On The Market

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API

1. Haier Window Air Conditioners

Is affordability top of your purchasing factors? If yes, consider getting a Haier window air conditioner. Haier, a Chinese manufacturing company, leads in sales worldwide. Their products are popular and cost-effective. Luckily, their low prices don’t mean low quality.

Their window air conditioners are small and easy to install, operate, and have great features.

Whereas you cannot compare Haier window air conditioners to the top brands in terms of noise, the sound they produce is bearable. However, if you don’t mind spending a little more money, buy their portable air conditioners. They are among the quietest.

Unfortunately, while you will save a lot of money by buying a Haier window air conditioner, you will need to worry about energy consumption. Why? Because Haier’s window air conditioners rank low on the list of the most energy efficient!

If you do not intend to use your window air conditioner for prolonged periods, Haier is your go-to brand. It will serve you and you will not feel the pinch of high energy consumption.

Best Haier window air conditioners:

Haier ESAQ406P Serenity Series 6050 BTU 115V...
  • High efficiency 11.2 EER
  • 6000 BTU room air conditioner for window-mounted installation
  • Uses standard 115V electrical outlet
  • Recommended cooling area: 151 to 250 sq. ft.
  • 4 modes include Cool, Fan, Energy Saver, and Dehumidify

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API

Also Read – Best Casement Window Air Conditioners


2. LG Window Air Conditioners

LG, the Life’s good company, is a household name across the world. Their window air conditioners, though readily available, are among the best—especially the 6,000 BTU. Their repair rates are very low, and this also applies to their window air conditioners.

While the best models of window air conditioners have an Energy Efficiency Ratio (EER) of 10, the EER of most LG models is 12 or more. An LG window air conditioner is one of your best choices if you are looking for efficiency and energy saving. Compared to others that match the high quality, efficiency, standard, and durability, their price tag is fair.

Unlike some renowned manufacturing companies who specifically cater to the niche that buys premium, LG offers various models; varying in tonnage capacity, specifications, and prices. Whether you are on a tight budget and need a standard window air conditioner, or are planning to acquire a top range model, make a stop at LG.

Check out their LG LW8016ER 8,000 BTU. It has exciting features including remote and thermostat control, four-way air deflection, digital electronic touch controls, automatic restart, 24 hours on or off timer, and filter alarm.

Best LG window air conditioners:

LG LW1216ER Window-Mounted Remote Control, 12,000...
  • Beat the heat while remaining cool and happy on hot summer days
  • Stay comfortable, even when it's hot outside with 3516.85 W cooling power
  • Stay comfortable with this air conditioner, which effectively cools rooms up to 550 Sq. ft.
  • With 3 fan speeds adjust the air flow to suit your needs
  • 4-way air deflection: By adjusting the deflection, air is directed up, down, left or right to move the air where it is needed most
  • Wattage: 990.0 watts

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API

Also Read – Cheap Window Air Conditioners


3. Koldfront Window Air Conditioners

Rick Lundbom set up Koldfront in 1999. Its mother company is Living Direct. At first, their mainstay was boats and RVs appliances, and then they diversified over time. His passion in the manufacture of appliances sprung from a life of selling and marketing boat and RVs appliances alongside his father and grandfather.

His dream was to manufacture affordable, but quality appliances that meet customer’s exact needs and the make, finishing and efficiency of Koldfront window air conditioners reflects this. They are Energy Star certified hence energy efficient; with an EER of 12—above the internationally accepted standard, 10 and they have great features.

Their cooling power ranges from 8,000 BTU to 14,000 BTU, but they consume about 20 percent less energy compared to other models with the same BTU. Plus, with the programmable timer, you can decide when it goes on or off and how long it needs to run for; and save more energy.

Koldfront window air conditioners are built to function in any environment and fit in any place. Additionally, they give you the option of a permanently installed window air conditioner that fits in the wall, or a portable one that you can just place on any of your windows.

Best Koldfront window air conditioners:

Koldfront 12,000 BTU 220V Heat/Cool Window Air...
  • 12,000 BTU 1100W/5.0A cooling; 11,000 BTU 3500W/16.0A heating functionality
  • 450- 550 sq. ft. coverage area; Remote control included; 4 operation modes; 2 year warranty
  • Installation hardware and weather seals included; 4-way air directional louvers
  • For a cool only version of this unit see model # WAC12002WCO; energy saver mode; EER 10.9;
  • Window Width: 26 7/8” to 36”; Window Minimum Height: 16 ½”; Input voltage: 220 V/60 Hz

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API


4. Kenmore Window Air Conditioners

The Kenmore brand is an American darling. The century-old industry leader in the manufacture of smart and classy appliances is renowned for simplifying customers’ lives, and their window air conditioners are not an exception.

Keeping abreast with technology, innovation and the changing times, Kenmore strives to give more than the standard features in every window air conditioner and, of course, that increases the cost of their models compared to others with similar specifications.

For instance, their window air conditioners feature the Smart Air Conditioner app. Once installed on your smartphone and connected with their air conditioner, you can set or program your air condition from wherever you are. You can turn your air conditioner on or off, schedule it and even set speed and such.

Best Kenmore Window Air Conditioner:

Kenmore Smart 04277107 Room Air Conditioner Works...
  • Connect Now: Control and monitor on the go with Kenmore Smart AC App on your phone or tablet
  • 10,000 BTU cools spaces up to 450 sq. ft. Cord Length : 6 feet. Filter Material : Polypropylene mesh
  • ENERGY STAR Certified. Recommended room size: 300 - 500 square feet
  • Electronic Control Panel and Remote - 3 fan speeds with removable washable filter
  • Works with Alexa - enable the Kenmore Smart skill in the Alexa Skill store, link your account and begin asking Alexa to interact with the Kenmore Smart appliance

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API


5. Frigidaire Window Air Conditioners

Frigidaire, formerly The Guardian Frigerator Company is a US company that was founded in 1916. On seeing The Guardian Frigerator Company’s innovation potential, Ford Motors bought it and renamed it Frigidaire.
In 1918, Frigidaire developed its first self-contained refrigerator. Over several decades in the 20th century, the company grew to a household name in the US and across the world. Today, Frigidaire features on every list of the most trusted brands.

Their products are top of the range. Making service calls over a malfunctioning Frigidaire product is rare. Most Americans swear by Frigidaire products. Matter of fact, before other brands started giving Frigidaire a run for its money, most Americans just referred to ‘fridge’ as a ‘Frigidaire’ regardless of the manufacturing company.

Frigidaire offers a wide range of window air conditioners, including portable ones, those with various attractive features, plus they come in different types and sizes. Whether you need a 5,000 BTU or 25,000 BTU, Frigidaire has you covered.

Their products are not only great but also reasonably priced, relatively small, and quite easy to install. They are known for energy efficiency too.

Best Frigidaire window air conditioners:

Frigidaire FFRA0511R1E 5, 000 BTU 115V...
  • 5,000 BTU mini-compact air conditioner for window-mounted installation uses standard 115V electrical outlet (Window mounting kit included)
  • Quickly cools a room up to 150 square feet with dehumidification up to 1.1 pints per hour
  • Mechanical rotary controls, 2 cool speeds, 2 fan speeds, and 2-way air direction.Window Width: 23 inches - 36 inches
  • Low power start-up, quiet operation and effortless restart.Exterior Dimensions Height: 12 inches. Width: 16 inches. Depth: 15-1/4 inches
  • Energy Efficiency Ratio (EER): 11.1, Measures: 16-Inches W x 15-1/4-Inches D x 12-Inches H.Motor RPM (Low): 1310

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API

6. Friedrich Window Air Conditioners

130 years of innovation, design, and manufacturing have perfected their products, elevating Friedrich to a leader in the HVAC industry.

Their strong warranty and out-of-the-world customer service endear them to many regardless of the price tag on their products. Friedrich window air conditioners are costly compared to others with the same features and BTU rating but if you want a quiet window air conditioner—that does not announce its presence in your living room; or interrupt your sleep if installed on the bedroom window, consider buying a Friedrich window air conditioner. Quietest air conditioners are their forte, especially their Kuhl Series like the Friedrich 5,800 BTU Window Air Conditioner.

Friedrich is credited for developing world’s first room air conditioner. They also wear the honorable badge of the first manufacturing company to cool a theatre, a hotel, and an office building.

Friedrich’s products are known for their tenacity. They work long hours without complaining. That is likely thanks to the quality materials and their hard-wearing components. Their commercial grade is a sure bet no matter the environment they are required to cool.

Their residential room air conditioners are much applauded by their customers too. They come with installation kit and feature 8-way air flow, Entry Guard Protection, anti-microbial air filter, wall and window sleeve, and high EER.

Most users are especially impressed with the window air conditioners from Kühl are customizable and vary in design. For instance, Kühl front panels are colored and interchangeable, and the smart ACs can be controlled from anywhere on a smartphone using the FriedrichLink app. Environment-conscious buyers also appreciate Friedrich’s energy-saving efforts.

A member of Energy Star—world’s leading advocate for energy efficiency and sustainability, besides inbuilt energy-saving mechanisms, Friedrich’s window air conditioners feature thermostats and timers. With a Friedrich window air conditioner, you don’t have to worry about a waste of energy or money.

Best Friedrich window air conditioners:

Friedrich Air Conditioning Co. Chill Series,...
  • POWERFUL - With 8,000 BTUs of cooling power, this durable room air conditioner will cool up to 300 square feet. This trusted air conditioner will keep your home cool whether you install as a window air conditioner or in a wall.
  • ULTRA QUIET OPERATION - AC units can be noisy but with this Friedrich Chill Series Air Conditioner is designed to cut operation noise to a minimum, giving you the luxury of enjoying the peace and quiet in your home.
  • CONTINUOUS AUTO AIR SWEEP - Experience the coolness of this energy star air room conditioner across your entire home. This compact AC unit automatically oscillates its louvers left and right during cooling, making sure you can feel the coolness everywhere.
  • POWER CORD FLEXIBILITY - Installation has never been easier. The power cord attached to this air conditioner can run either left of right, out of the side or front of the unit.
  • SPECIFICATIONS - 20.7 x 18.6 x 13.9 inches (DxWxH)

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API

Also Read – Best Window Air Conditioner with Heat

7. GE Appliances Window Air Conditioners

GE Appliances window air conditioners come with EZ-mount installation and snugly fit in traditional-style windows. Most customers are particularly happy about GE AEM08LX Window Air Conditioner.

They attest despite its small size, the 8,000 BTU air conditioner packs a strong cooling punch, and dehumidifies up to 2.3 pints every hour. Its filter is easy to remove hence hassle-free cleaning, and the unit’s programmable 24-hour on/off timer helps to save energy and money.

GE Appliances pride in being the first to launch voice-enabled air conditioners. With these units, you do not need to lift a finger to turn on and off, adjust the temperature, or speed. Just talk… They also have an app that you can install on your smartphone to operate your window air conditioner while away.

Most of their appliances come with at least one year manufacturer’s warranty and are Energy Star rated.

Best GE window air conditioners:

GE AHM06LW 19" Energy Star Qualified Window Air...
  • Electronic digital thermostat and remote control 3 cooling / 3 fan speeds ENERGY STAR qualified EZ Mount window installation kit included Fixed chassis

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API

Also Read – Most Energy Efficient Window Air Conditioners


8. Emerson Quiet Kool Window Air Conditioners

Emerson Quiet Kool is an American manufacturing and marketing company that was founded in 1949. As one of the renowned brands, the company boasts several innovative products that seek to offer customers efficiency, comfort, and reliability.

They cater to both commercial and residential customers. Whether you need to cool your room at home or a business environment, you can depend on Emerson Quiet Kool window air conditioners.

Their silent window units feature 8,000 BTUs to cool rooms from 250 – 350 square feet easily. They are Energy Star certified, can be fixed at 62-86 degrees, and they have models with a higher BTU to cool larger rooms.

Emerson air conditioner models features:

  • Energy Star rating and UL listed
  • Programmable 24-hour on/off timer
  • Remote control
  • Large LED display
  • Optional expert setup
  • Louvers that allow for 8-way airflow directional vents
  • Three cooling speeds to choose from
  • Three fan speeds to choose from
  • Washable/reusable air filter
  • One year warranty on labor, two years on parts, and five years on compressor.

Best Emerson Quiet Kool window air conditioners:

Emerson Quiet Kool 8,000 BTU 115V Window Air...
  • 8,000 BTU air conditioner with fixed chassis for window-mounted installation cools a room from 250 to 350 sq. ft.
  • 2017 Energy Star unit uses less energy saving money on utility bills (12.1 EER)
  • 1-2-5 years warranty! (1 year labor, 2 years parts and 5 years compressor)
  • Flexible options include Cool, Dry, Fan and Auto mode
  • Excess moisture removal up to 2.1 pints per hour for a more comfortable environment

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API

Also Read – Quietest Window Air Conditioners


9. Sunpentown (SPT)

Sunpentown International (SPT) is an appliances manufacturing company that started off as Sunpentown Electric Company in 1985 at Keelung in Taiwan. Today, it’s headquartered in California, USA, and has branches in major manufacturing countries including Japan and China.

SPT’s mainstay is manufacturing home and kitchen appliances. While the induction cooker was their first domestic product, SPT has diversified, including humidifiers and air conditioners on their long list of products. The beautiful part of SPT is that their prices are friendly.

Their best window air conditioner models have three fan speeds; auto, dry, fan and cooling modes, energy savers that are thermostat controlled, remote controls, auto restart option, and UL listing and energy star rating.

Best SPT window air conditioner models;

SPT 8,000btu Energy Star Window AC, 8000 BTU,...
  • 3 fan speeds; 4 modes: auto, cool, dry and fan
  • Auto restart feature
  • Thermostat controlled energy saver
  • Remote control; up to 24 hours timer setting
  • UL and energy star

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API


10. Whirlpool Window Air Conditioners

Whirlpool is one of the most trusted manufacturers. Their window air conditioners are durable, efficient—with an EER of 10 and above, are UL listed for safety, Energy Star rated, and relatively low noise of 65 decibels.

For instance, Whirlpool 15000 BTU Window air conditioner features 3-fan speeds, and 3-cool settings, and efficiently cools living spaces of up to 700 square feet.

This remote controlled air conditioner is easy to install, fits into a 28 to 41 inches wide window, has an EER of 11.9, features an easy to read LED display, sleep mode, automatic restart, 8-way air venting direction, programmable 24-hour timer, and a washable/ reusable air filter.

This UL listed, Energy Star certified unit has a high Energy Efficiency Rating of 11.9, a 4.9-foot power cord, electronic control interface with an easy to read LED digital display. The only problem seems to be poor customer care.

Best Whirlpool window air conditioner:

Whirlpool 5,000 BTU 115V Window-Mounted Air...
  • 5, 000 btu air conditioner for window-mounted installation
  • 5.9-Ft. Lcdi power cord with 3-prong grounded plug uses 115V electrical outlet
  • Cools a room up to 150 sq. Ft. With up to 1.06 pints per hour dehumidification
  • Mechanical rotary controls with 2 fan speeds (low and high)
  • After a power failure, unit automatically restarts when power is restored
  • Air flow capacity 135 CFM
  • Product Dimensions: 16” W x 15.3” D x 12.5” H

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API


11. Midea Window Air Conditioners

Midea is a publicly listed Fortune 500 company that was established in 1968. It is headquartered in China, and they are specialized in refrigeration, air treatment, laundry, water appliances, floor care, lighting, and kitchen appliances.

With over 20 production facilities and more than 250 logistics centers across the world, Midea makes the list of the global manufacturing companies with the highest sales across the globe.

You can’t go wrong with a Midea appliance. The Arctic King 5,000 BTU Air Conditioner, for example, is quite affordable, yet it is easy to install, has a compact design with enough power to cool a room of up to 150 square feet, has a 24-hour timer, 3 fan speeds, 4-way air direction, and a washable/ reusable air filter. It is also quiet with decibels 55.1 on high, and Energy Star and CEER rated.

Best Midea window air conditioners:

Arctic King WWK05CM91N Window Air Conditioner,...
  • SPECIAL DESIGN - Mini compact for small room, cools 150 Square Feet, 5, 000 BTU
  • HIGH CEERS - 11. 0 combined energy efficiency rate (CEER),helps reduce energy costs,
  • FEATURES INCLUDE - 7 temperature settings, 2 cooling and fan settings, 2-way air direction ,easy to control
  • EASY INSTALLATION - Installs easily without significant modification to the existing window frame. Fits windows 23''-36'' wide, minimum height 13''. All mounting accessories are included. A screwdriver is required for installation. For some window frames, pilot holes are recommended before installing screws. Please see included instruction manual for further detail
  • WORLDWIDE - As a testament to our dedication to quality, we offer a one year parts and labor on this product
  • Wattage: 450 W; Power Cord Length: 6.23ft

Last update on 2020-10-25 / Affiliate links / Images from Amazon Product Advertising API


Choosing the Right Window Air Conditioner: What you Should Consider Before Making a Purchase

To pick the best window air conditioner, you need to be clear about the features and functions you desire. This depends on a lot of factors including the size and style of your window, the size of the room you want to cool, whether you want your window air conditioner to double up as a heater during winter, your estimated budget, how sensitive you are to noise, the smart features you fancy, and such. The list is endless.

To help you narrow down to what matters, pay close attention to:

1. The Size of the Room you want to Cool

The cooling capacity of a window air conditioner depends on the size of the room. This capacity ranges from 5,500 BTU/hour to 14,000 BTU/hour.
You need to get a window air conditioner with the right BTU for your room. One way to do this right is remembering for every square foot of space to be cooled; you need 20 BTU.

Getting an air window conditioner with higher BTU for a small room might seem like a good idea, but it’s counterproductive. While it will cool your room fast, the humidity will still rent the air in your room. A window air conditioner with lower BTU will deal with both—slowly but surely.
On the other hand, a low BTU air conditioner for a big room will be a waste of energy and a set up for disappointment.

How to Tell what Size your Room is

Multiply the length and width of your room and then do the math; factoring for every square feet, you need 20 BTU.

Basically, for rooms up to 300 square feet, buy a window air conditioner of between 5,000 BTU to 6,500 BTU.

Medium sized air conditioners run 7,000 to 8200 BTUs per hour and cool rooms of up to 400 square feet.

Bigger rooms of up to 650 square feet need 9,800 to 12,500 BTU window air conditioner to cool efficiently. These units are large, heavy and harder to install than the small and medium sized. For commercial use:

  • 700 to 1,000 sq. ft = 18,000 BTU
  • 1,000 to 1,200 sq. ft = 21,000 BTU
  • 1,200 to 1,400 sq. ft = 23,000 BTU
  • 1,400 to 1,500 sq. ft = 24,000 BTU
  • 1,500 to 2,000 sq. ft = 30,000 BTU
  • 2,000 to 2,500 sq.ft = 34,000 BTU

Note: For optimum performance, you will need to adjust your window air conditioner depending on the temperature of the room you want to cool, the number of people in the room, and the weather outside.

If the unit is meant to cool the kitchen, add 4,000 BTU, if there are more people in a room, add 600 BTU per person, and on hot days, increase your window air conditioner’s capacity by 10 percent

2. Energy Efficiency

A window air conditioner’s efficiency is measured by EER, the ratio of cooling capacity to the power input. The higher the EER, the more energy efficient a cooling unit is. Every 1.0 EER increases energy efficiency by 10 percent. To conserve energy and save money, find an air conditioner with an EER of at least 12.

Additionally, you might want to find a unit that is Energy Star certified. It will save 10 percent energy compared to using other window air conditioners in the same class.

3. The Cost of Running the AC

Since October 26, 2015, Energy Star rated window air conditioners have had to meet the Energy Star 4.0 standard which sets power use at 10 percent less than the older window air conditioner models.

Old models and the low EER units are cheaper. However, the cheaper the unit, the costlier it will be in terms of energy consumption and maintenance. Conversely, top range window air conditioners with an EER of 10 and above are expensive to acquire but energy efficient, and they hardly breakdown, or need costly maintenance. They are an investment.

Most people choose energy efficiency, and this has increased in-house technologies for further savings. For instance, some air conditioners come with Individual Temperature Control (ITC) sensor which prevents over-conditioning.

Plus, some have motion sensors which further reduces energy consumption by operating only when a room is in use. The smart air conditioners that feature these are pricier than the standard cooling units but worth every penny.

4. Smart Options

If you are keen on technology, innovation, and always desire ease, speed, and efficiency, you might want to look at systems with smart modern functions. Most of them give you full control over your air conditioner, e.g. programmable 24-hour timer, touchscreen LED Smart Display, remote control, air filter alert indicators, and an app that helps you control your system on your mobile phone or tablet no matter where you are.

5. Reliability

How long do you need the window air conditioner to serve you? If you need one for keeps, the pricier models and especially from the more reputable companies [like these we have covered] are the best buys.

They will save your money through low energy consumption and no-repairs, and in the rare event your unit fails to function properly, you will promptly get the necessary assistance—mostly at no extra cost because major manufacturing often offers after-sale services. Plus, they have great customer care!

6. Noise

While the noise that comes from vibrations from the window frame, loose front grill, foreign objects getting in, bent fan blades, or lack of lubrication on the motor can be fixed, there is little you can do with a window air conditioner that operates with steady noise. Some are loud and annoying.

If you cannot stand background noise, it is important to check out the decibel levels before buying—especially if you intend to cool your bedroom, library, and such quiet rooms. Friedrich, LG and Frigidaire pride in some of the most silent window air conditioners in the market; e.g., Frigidaire FFRA0511R1 5000 BTU Window Air Conditioner. On high, its noise level is 56.5 decibels.

7. Electrical Requirements

Check whether your home’s or office’s electrical system meets the power requirements of the unit you intend to buy. Most window air conditioners need 115-volt or 230-volt circuits. Standard households have a 115-volt branch circuit, but a bigger window air conditioner which is rated at 115 volts will need a dedicated circuit of 230 volts.

If you want to cool a big room, try models with high BTU like Friedrich Kuhl 11,900 BTU. Alternatively, you can always get one with a “turbo” fan mode to help drive air further.

8. Heating Ability

Buying a hot and cold window air conditioner that serves all year round; heating in winter and cooling in summer is cost effective, especially if you find an energy efficient one.

9. Style of the Window

Consider the type of the windows in the room. Slider windows open by sliding to the side, casement windows swing out to open, and standard windows open and close up and down.

Most installation kits work with slider and standard windows, so if you plan to install the unit on a casement style window, look for a window air conditioner that suits the window style. Some people try their own DIY ideas but it is not always a good idea as it may cause an accident.


While it is difficult to pick the best window air conditioner brands from a pool of many, this guide will make your search less stressful, and ensure you settle for the best. If you’re on a tight budget, we’d recommend the Haier HWF05XCL 5,000 BTU. If you want an energy efficient, reliable, small, and easy to install model, go with Frigidaire FFRA1022R1 10000 BTU.

Before you embark on your search, calculate the square feet of the room you want to cool. After that, consider your window style, your estimated budget, and then proceed to the finer details like noise, energy efficiency rating, smart features, and such, and you will end up with a model that not only suits your room but also complements your lifestyle.