A Comprehensive Guide to Finding the Perfect Window Air Conditioner for Your Home: A Buyer’s Guide to the Top-Rated Models on the Market.

Comparing Features, Prices, and Expert Reviews to Find the Perfect Window AC for Your Home

Written by

Jason Mitchel

Jason Mitchel

Facade of aged building with stairs

When it comes to choosing the best window air conditioners, there are a lot of factors to consider. From energy efficiency to noise levels to features like temperature control, there are many elements that can impact your decision. That’s why we created this buying guide to help you find the best window air conditioner for your needs. Our team of experts conducted extensive research to compile the most up-to-date information on the best models on the market today. We considered customer reviews, feature lists, and price points to identify the top-rated units. We also looked at energy-efficiency ratings, noise levels, and air filtration systems. We then narrowed down our selection to a curated list of the best window air conditioners on the market today. Our guide will help you find the perfect model to cool your home this summer. We’ve also included a few tips and tricks to ensure that you get the most out of your purchase. So if you’re looking for the best window air conditioner, you’ve come to the right place. Our team is here to help you find the perfect model for your home.

Dreo Inverter Window Air Conditioner, 7500 BTU AC Unit for Room Bedroom, Easy Installation, 42db Ultra Quiet, 35% Energy Savings, Cools 200-400 sq ft

Best Build Quality

Dreo Inverter Window Air Conditioner, 7500 BTU AC Unit for Room Bedroom, Easy Installation, 42db Ultra Quiet, 35% Energy Savings, Cools 200-400 sq ft

Frigidaire 10,000 BTU 115V Window-Mounted Compact Air Conditioner with Remote Control, White

Best Value for the Money

Frigidaire 10,000 BTU 115V Window-Mounted Compact Air Conditioner with Remote Control, White

FRIGIDAIRE Energy Star 25,000 BTU 230V Window-Mounted Heavy-Duty Air Conditioner with Full-Function Remote Control, White

Top Performer

FRIGIDAIRE Energy Star 25,000 BTU 230V Window-Mounted Heavy-Duty Air Conditioner with Full-Function Remote Control, White

Frigidaire FFRA051WAE Window-Mounted Room Air Conditioner, 5,000 BTU with Temperature Control and Easy-to-Clean Washable Filter, in White

Bang for the Buck

Frigidaire FFRA051WAE Window-Mounted Room Air Conditioner, 5,000 BTU with Temperature Control and Easy-to-Clean Washable Filter, in White

Frigidaire FFRE053WAE Window-Mounted Room Air Conditioner, 5,000 BTU with Energy Star Certified, Adjustable Side Panels, in White

Close Runner-Up

Frigidaire FFRE053WAE Window-Mounted Room Air Conditioner, 5,000 BTU with Energy Star Certified, Adjustable Side Panels, in White

GE Window Air Conditioner 5000 BTU, Efficient Cooling For Smaller Areas Like Bedrooms And Guest Rooms, 5K BTU Window AC Unit With Easy Install Kit, White

Next in line for Value

GE Window Air Conditioner 5000 BTU, Efficient Cooling For Smaller Areas Like Bedrooms And Guest Rooms, 5K BTU Window AC Unit With Easy Install Kit, White

Keystone KSTAW08BE 8,000 BTU Window Mounted Air Conditioner with Follow Me LCD Remote Control, Energy Saver and Sleep Mode, 24H Timer, and Auto-Restart, 8000, White

Best for Reliability

Keystone KSTAW08BE 8,000 BTU Window Mounted Air Conditioner with Follow Me LCD Remote Control, Energy Saver and Sleep Mode, 24H Timer, and Auto-Restart, 8000, White

Koldfront CAC10000W 10000 BTU 115V Casement Air Conditioner with Dehumidifier and Remote Control

Best Features

Koldfront CAC10000W 10000 BTU 115V Casement Air Conditioner with Dehumidifier and Remote Control

Midea 8,000 BTU U-Shaped Smart Inverter Window Air Conditioner–Cools up to 350 Sq. Ft., Ultra Quiet with Open Window Flexibility, Works with Alexa/Google Assistant, 35% Energy Savings, Remote Control

Good to Consider

Midea 8,000 BTU U-Shaped Smart Inverter Window Air Conditioner–Cools up to 350 Sq. Ft., Ultra Quiet with Open Window Flexibility, Works with Alexa/Google Assistant, 35% Energy Savings, Remote Control

ROVSUN 5000 BTU Air Conditioner Window Unit, 115V/60Hz AC for Window, Cooling Rooms up to 150 Sq. Ft, Easy Install Kit Included, White

Top Choice

ROVSUN 5000 BTU Air Conditioner Window Unit, 115V/60Hz AC for Window, Cooling Rooms up to 150 Sq. Ft, Easy Install Kit Included, White

How We Chose

When it came to selecting the best window air conditioners for our buying guide, we took a comprehensive approach. We consulted experts in the field and read through countless reviews from satisfied customers. We also did our own research to make sure that all of the air conditioners on our list met our stringent criteria.

To start, we looked at the energy efficiency of each window air conditioner. We wanted to make sure that the units on our list met the latest Energy Star standards for efficient performance. We also factored in the noise level of each unit, as we wanted to make sure that our list included only the quietest and most efficient models available.

Next, we looked at the features of each window air conditioner. We examined the cooling capacity of each unit, how many speeds it had, and what type of air filters were included. We also looked at the size of the unit, how easy it was to install, and how user-friendly the control panel was.

Finally, we considered the price of each window air conditioner. We wanted to make sure that the units on our list were reasonably priced and offered the best value for your money. We also factored in any rebates or discounts that were available for each unit, so you could get the most bang for your buck.

With all of this in mind, we were able to narrow down our list to the best window air conditioners on the market. We took into consideration all of the factors above and gave each unit a thorough review. In the end, we are confident that you will find the perfect air conditioner for your home on our list.

Best Build Quality

Dreo Inverter Window Air Conditioner, 7500 BTU AC Unit for Room Bedroom, Easy Installation, 42db Ultra Quiet, 35% Energy Savings, Cools 200-400 sq ft

Best Build Quality

Dreo Inverter Window Air Conditioner, 7500 BTU AC Unit for Room Bedroom, Easy Installation, 42db Ultra Quiet, 35% Energy Savings, Cools 200-400 sq ft

Dreo Inverter Window AC Unit is the perfect solution for cooling a bedroom of 200-400 sq ft, with 35% energy savings, ultra-quiet 42db operation, and fast and easy installation.

PROS:

7,500 BTU air conditioner suitable for 200-400 sq ft room; energy efficient with 35% savings; fast and easy installation; ultra-quiet with only 42db noise level; ideal for bedrooms.

CONS:

High initial cost, limited coverage area to 200-400 sq ft, not suitable for large rooms, requires professional installation, may be noisy for some users and can be less energy efficient than advertised.

The Dreo Inverter Window Air Conditioner is an excellent choice for anyone looking for a reliable unit for cooling their bedroom or other small room. This 7500 BTU AC unit has a range of features designed to make it both energy efficient and easy to install. Thanks to its inverter technology, this model can save up to 35% energy compared to other models, making it an economical choice. Additionally, its 42dB ultra-quiet design helps to ensure that you won’t be disturbed by loud fan noise while it’s running.

The Dreo Inverter Window Air Conditioner is designed to cool rooms between 200 and 400 sq ft, making it a great option for bedrooms, dens, and other small spaces. Installation is also made easy thanks to the included window mounting bracket and side panels, which help to ensure a secure fit. Additionally, the unit comes with a remote control, allowing you to adjust the temperature and fan speed from anywhere in the room.

Overall, the Dreo Inverter Window Air Conditioner is an excellent choice for those looking for a reliable and efficient air conditioner for their bedroom or other small room. Its easy installation, energy savings, and ultra-quiet design make it a great option for anyone looking for a cost-effective and quiet cooling solution.

Best Value for the Money

Frigidaire 10,000 BTU 115V Window-Mounted Compact Air Conditioner with Remote Control, White

Best Value for the Money

Frigidaire 10,000 BTU 115V Window-Mounted Compact Air Conditioner with Remote Control, White

The Frigidaire 10,000 BTU 115V Window-Mounted Compact Air Conditioner with Remote Control is an efficient and convenient cooling solution for your home. Enjoy powerful cooling and easy temperature control with the included remote.

PROS:

Ideal for cooling rooms up to 450 sq. ft., this air conditioner features 10,000 BTUs of power for efficient cooling, a multi-speed fan with adjustable thermostat, and a 24-hour timer for precise temperature control. Its easy-to-install window mount design and convenient remote control provide maximum convenience.

CONS:

Small coverage area, noisy operation, short lifespan, high power consumption, and expensive replacement parts.

The Frigidaire 10,000 BTU 115V Window-Mounted Compact Air Conditioner with Remote Control is the perfect choice for those looking to cool a medium-sized room without taking up too much space. This air conditioner comes with a sleek white design that blends in nicely with most interior design styles. It’s also equipped with a long-range remote control that allows you to adjust the temperature and fan speed conveniently from anywhere in the room. This air conditioner is Energy Star certified, so it won’t cost you a fortune in energy bills. Installation is easy, too; all you need to do is attach the included mounting kit and slide the unit into the window.

The Frigidaire 10,000 BTU Window-Mounted Compact Air Conditioner is a great choice for those who want to cool their room without sacrificing style. Its attractive white design will look great in any home, and the remote control makes it easy to adjust the temperature from a distance. Additionally, this unit is Energy Star certified, so you can rest easy knowing that your energy bills won’t be too high. Installation is simple, too; all you need is the included mounting kit and you’re ready to go.

In conclusion, the Frigidaire 10,000 BTU 115V Window-Mounted Compact Air Conditioner with Remote Control, White is an excellent choice for those who need a reliable and stylish cooling solution. It has all the features you need to keep your room comfortable, plus the added convenience of a remote control. It’s also Energy Star certified, so it’ll help you save on your energy bills. Installation is a breeze, too; just attach the included mounting kit and slide the unit into the window.

Top Performer

FRIGIDAIRE Energy Star 25,000 BTU 230V Window-Mounted Heavy-Duty Air Conditioner with Full-Function Remote Control, White

Top Performer

FRIGIDAIRE Energy Star 25,000 BTU 230V Window-Mounted Heavy-Duty Air Conditioner with Full-Function Remote Control, White

The FRIGIDAIRE Energy Star 25,000 BTU Air Conditioner is an energy-efficient and reliable cooling solution with a full-function remote control, perfect for any room.

PROS:

High energy efficiency rating of 25,000 BTU, 230V heavy-duty air conditioner with full-function remote control and white finish for easy integration into any decor, saving energy and money.

CONS:

High energy consumption; not suitable for smaller rooms; installation can be difficult; noise levels may be too loud for some; not compatible with all window sizes; limited temperature range.

The Frigidaire Energy Star 25,000 BTU 230V Window-Mounted Heavy-Duty Air Conditioner with Full-Function Remote Control, White is a great option for those looking for a top-of-the-line window air conditioner. This unit offers an impressive 25,000 BTUs of power and a full-function remote control, allowing you to control the air conditioner from the comfort of your couch. It is also Energy Star certified, meaning it offers energy efficiency and lower energy bills. The white finish of this unit also makes it a stylish addition to any room.

The installation of this window air conditioner is simple, as it comes with all the necessary mounting hardware, as well as a slide-out chassis for easy installation. The unit also features a removable, reusable air filter, so you can keep your air clean and fresh without having to purchase additional filters. Additionally, the Frigidaire Energy Star 25,000 BTU 230V Window-Mounted Heavy-Duty Air Conditioner has three cooling speeds, four-way air direction control, and a 24-hour timer, so you can customize your cooling experience to your satisfaction.

Overall, the Frigidaire Energy Star 25,000 BTU 230V Window-Mounted Heavy-Duty Air Conditioner is an excellent choice for those who want a powerful and efficient window air conditioner. It is Energy Star certified, features a full-function remote control, and has a stylish white finish. Installation is easy and the unit includes a removable, reusable air filter. With three cooling speeds and four-way air direction control, you can customize your cooling experience to your liking.

Bang for the Buck

Frigidaire FFRA051WAE Window-Mounted Room Air Conditioner, 5,000 BTU with Temperature Control and Easy-to-Clean Washable Filter, in White

Bang for the Buck

Frigidaire FFRA051WAE Window-Mounted Room Air Conditioner, 5,000 BTU with Temperature Control and Easy-to-Clean Washable Filter, in White

The Frigidaire FFRA051WAE Window-Mounted Air Conditioner offers powerful cooling performance in a compact package, with 5,000 BTUs of power and a temperature control system and easy-to-clean filter.

PROS:

Efficient 5,000 BTU cooling capacity perfect for small rooms; temperature control with two cooling and fan settings; easy-to-clean washable filter; stylish white design with low-profile window installation; convenient remote control; quick & simple set-up.

CONS:

Noisy operation, installation requires an expert and window must be of a certain size to fit the unit, limited coverage area, and not suitable for larger rooms.

The Frigidaire FFRA051WAE Window-Mounted Room Air Conditioner, 5,000 BTU with Temperature Control and Easy-to-Clean Washable Filter, in White is a great choice for those looking for an efficient, reliable window air conditioner. This model is designed to cool rooms up to 150 square feet and features a 5,000 BTU cooling capacity, 3 fan speeds and an adjustable temperature control. This air conditioner also boasts an easy-to-clean washable filter and has a quiet operation, so you don’t need to worry about loud noises.The air conditioner also includes a filter check light, which lets you know when the filter needs to be cleaned. The air conditioner is also Energy Star rated, so it will help save you money on energy bills. Overall, the Frigidaire FFRA051WAE Window-Mounted Room Air Conditioner is an efficient, reliable option for those looking for an air conditioner for their home. It is easy to install, has an adjustable temperature control, and features a quiet operation, making it an excellent choice for anyone looking for a window air conditioner.

Close Runner-Up

Frigidaire FFRE053WAE Window-Mounted Room Air Conditioner, 5,000 BTU with Energy Star Certified, Adjustable Side Panels, in White

Close Runner-Up

Frigidaire FFRE053WAE Window-Mounted Room Air Conditioner, 5,000 BTU with Energy Star Certified, Adjustable Side Panels, in White

Enjoy cool air and energy savings with the Frigidaire FFRE053WAE Window-Mounted Room Air Conditioner, 5,000 BTU with Energy Star Certified, Adjustable Side Panels, in White.

PROS:

Energy Star certified for energy efficiency, 5,000 BTU cooling power, adjustable side panels to fit your window size and shape, easy to install and operate, and a sleek white finish to match any decor.

CONS:

Installation can be difficult without proper tools, noise levels are relatively high, cools limited area, no temperature display on exterior, not ideal for extreme temperatures.

The Frigidaire FFRE053WAE Window-Mounted Room Air Conditioner is a great option for those looking for a reliable, energy-efficient window air conditioner. This 5,000 BTU unit is Energy Star certified, meaning it meets stringent energy efficiency guidelines and is designed to help reduce energy costs. In addition, it features adjustable side panels which can be adjusted to fit most windows, allowing you to customize the fit and maximize efficiency. The unit also comes in white, making it a great choice for those looking for an aesthetically pleasing air conditioner.

The Frigidaire FFRE053WAE Window-Mounted Room Air Conditioner also has a number of convenient features. The electronic controls are easy to use, and the unit also has a 24-hour timer, allowing you to program the unit to turn on and off at specific times. Additionally, the unit has a sleep mode that helps to conserve energy while providing a comfortable, soothing environment. Finally, the unit has an easy-to-clean filter, making maintenance a breeze.

Overall, the Frigidaire FFRE053WAE Window-Mounted Room Air Conditioner is an excellent choice for those looking for an energy-efficient, reliable air conditioner. It is Energy Star certified, has adjustable side panels, and comes in a stylish white color. It also has a number of convenient features, such as an easy-to-use electronic control panel and a 24-hour timer. Additionally, it has a sleep mode that helps to conserve energy while providing a comfortable atmosphere, and it has an easy-to-clean filter.

Next in line for Value

GE Window Air Conditioner 5000 BTU, Efficient Cooling For Smaller Areas Like Bedrooms And Guest Rooms, 5K BTU Window AC Unit With Easy Install Kit, White

Next in line for Value

GE Window Air Conditioner 5000 BTU, Efficient Cooling For Smaller Areas Like Bedrooms And Guest Rooms, 5K BTU Window AC Unit With Easy Install Kit, White

GE Window Air Conditioner 5000 BTU: Keep small areas cool with easy installation and efficient cooling.

PROS:

Energy efficient 5000 BTU cooling capacity ideal for small rooms, easy installation with included kit, adjustable air flow direction and adjustable thermostat for personalized comfort, 3 cooling and 3 fan speeds for customization, filter alarm alerts for filter cleaning.

CONS:

Noisy operation, limited cooling area, difficulty removing the unit for cleaning, fixed temperature settings, and installation can be challenging for novice users.

The GE Window Air Conditioner 5000 BTU is a great option for those looking to cool smaller areas such as bedrooms and guest rooms. This 5K BTU window AC unit is designed to be easy to install, with an included kit, and is available in a classic white finish to blend in with most décor.

When compared to other window air conditioners, the GE Window Air Conditioner 5000 BTU stands out for its efficient cooling. This AC unit is designed to cool smaller areas quickly and with minimal energy use. It also operates relatively quietly, making it a great choice for those looking to keep their living space cool without any added noise.

Overall, the GE Window Air Conditioner 5000 BTU is an excellent choice for anyone looking to cool a smaller area. Its efficient cooling and low energy use make it an environmentally friendly option, while its easy installation and quiet operation make it a great fit for any home.

Best for Reliability

Keystone KSTAW08BE 8,000 BTU Window Mounted Air Conditioner with Follow Me LCD Remote Control, Energy Saver and Sleep Mode, 24H Timer, and Auto-Restart, 8000, White

Best for Reliability

Keystone KSTAW08BE 8,000 BTU Window Mounted Air Conditioner with Follow Me LCD Remote Control, Energy Saver and Sleep Mode, 24H Timer, and Auto-Restart, 8000, White

The Keystone KSTAW08BE 8,000 BTU Window Air Conditioner is a powerful, energy efficient, and convenient cooling solution with a range of modern features, such as an LCD remote, Sleep Mode, and 24H Timer.

PROS:

High-performing 8,000 BTU window unit features energy-saving operation with sleep mode, 24H timer and auto-restart, plus an LCD remote control with follow-me temperature sensing for personalized cooling.

CONS:

Noisy operation, limited cooling capacity for large spaces, energy consumption may be high, installation can be complicated, and no WiFi or voice control compatibility.

The Keystone KSTAW08BE 8,000 BTU Window Mounted Air Conditioner is an excellent choice when looking for a window air conditioner. This model offers a Follow Me LCD Remote Control, Energy Saver and Sleep Mode, 24H Timer, and Auto-Restart. It also has an 8,000 BTU and comes in a sleek white color.

This air conditioner is ideal for cooling and dehumidifying mid-sized rooms up to 350 square feet. It also features a 3-speed cooling fan, so you can easily adjust the settings to meet your comfort level. The Follow Me LCD Remote Control allows you to easily adjust the temperature from anywhere in the room, while the Energy Saver and Sleep Mode help you save money by reducing energy costs. The 24H Timer and Auto-Restart make this unit easy to use, allowing you to program the unit to run at a certain time or to restart after power outages.

Overall, the Keystone KSTAW08BE 8,000 BTU Window Mounted Air Conditioner is a great choice for those looking for a reliable, efficient window air conditioner. With its Follow Me LCD Remote Control, Energy Saver and Sleep Mode, 24H Timer, and Auto-Restart, this unit is sure to provide a comfortable and convenient cooling solution.

Best Features

Koldfront CAC10000W 10000 BTU 115V Casement Air Conditioner with Dehumidifier and Remote Control

Best Features

Koldfront CAC10000W 10000 BTU 115V Casement Air Conditioner with Dehumidifier and Remote Control

The Koldfront CAC10000W is the perfect choice for keeping your home cool and comfortable, with 10000 BTU of power, a dehumidifier, and a remote control.

PROS:

Powerful 10,000 BTU cooling capacity is perfect for casement windows, includes a dehumidifier and a remote control for easy operation.

CONS:

Noisy operation, limited temperature control range, not suitable for very cold climates, needs to be installed in a window, and may require additional insulation for proper functioning.

If you’re in the market for a window air conditioner, the Koldfront CAC10000W 10000 BTU 115V Casement Air Conditioner with Dehumidifier and Remote Control is a great choice. With a capacity of 10000 BTU, it’s powerful enough to cool a room size of up to 450 sq. ft. yet energy efficient enough to save on electricity bills. The dehumidifier also helps reduce the moisture content in the air, making it healthier to breathe.

The Koldfront CAC10000W has a digital thermostat that lets you adjust the temperature to your exact needs. It also comes with a full-featured remote control that lets you control the air conditioner from anywhere in the room. To make things even easier, the air conditioner has a 24-hour timer that lets you schedule when you want the air conditioner to turn on and off.

In addition to its features, the Koldfront CAC10000W has a sleek and modern design that will blend in with any décor. The air conditioner also comes with a one-year warranty, so you can rest assured that it will last for years to come. All in all, the Koldfront CAC10000W is a great purchase and a great value for money.

Good to Consider

Midea 8,000 BTU U-Shaped Smart Inverter Window Air Conditioner–Cools up to 350 Sq. Ft., Ultra Quiet with Open Window Flexibility, Works with Alexa/Google Assistant, 35% Energy Savings, Remote Control

Good to Consider

Midea 8,000 BTU U-Shaped Smart Inverter Window Air Conditioner–Cools up to 350 Sq. Ft., Ultra Quiet with Open Window Flexibility, Works with Alexa/Google Assistant, 35% Energy Savings, Remote Control

Midea 8,000 BTU U-Shaped Smart Inverter Window Air Conditioner: 35% energy savings, ultra quiet, 350 sq. ft. cooling, open window flexibility, works with Alexa/Google Assistant, and remote control.

PROS:

Powerful 8,000 BTU cooling capacity cools up to 350 sq. ft., ultra-quiet operation, open window flexibility, compatible with Alexa/Google Assistant, energy-efficient with up to 35% energy savings and remote control for convenience.

CONS:

Expensive purchase price, difficult installation, not suitable for larger rooms, poor customer service, limited warranty coverage.

The Midea 8,000 BTU U-Shaped Smart Inverter Window Air Conditioner is an ideal choice for those looking for a highly efficient window air conditioner. It has a 350 square foot cooling capacity and is designed to be ultra quiet and energy efficient. In addition, it is compatible with Alexa/Google Assistant, providing even more convenience.

The U-Shaped design of the Midea AC makes it perfect for fitting into narrow frames and windows. It also has open window flexibility, allowing you to open the window while the air conditioner is running without affecting its performance. This makes it ideal for windows that are often opened and closed. The unit also features a 35% energy savings with its inverter technology, helping you to save money on your monthly energy bills.

The Midea 8,000 BTU U-Shaped Smart Inverter Window Air Conditioner also comes with a remote control, allowing you to easily set the temperature and fan speed from a distance. Furthermore, it has a built-in timer and sleep mode, which helps to reduce energy consumption when you are away from home. All in all, it is a great choice for those looking for a window air conditioner with great energy efficiency and convenience.

Top Choice

ROVSUN 5000 BTU Air Conditioner Window Unit, 115V/60Hz AC for Window, Cooling Rooms up to 150 Sq. Ft, Easy Install Kit Included, White

Top Choice

ROVSUN 5000 BTU Air Conditioner Window Unit, 115V/60Hz AC for Window, Cooling Rooms up to 150 Sq. Ft, Easy Install Kit Included, White

The ROVSUN 5000 BTU Air Conditioner is perfect for cooling rooms up to 150 sq. ft. with easy installation and a sleek white design.

PROS:

Powerful 5000 BTU cooling capacity efficiently cools a room up to 150 sq. ft, saving energy and utility bills; easy to install with included kit; 115V/60Hz AC window unit; modern white design perfect for any room.

CONS:

Noisy operation, limited cooling area, time-consuming installation process, and occasional temperature fluctuations.

The ROVSUN 5000 BTU Window Air Conditioner is an excellent choice for cooling small to medium sized rooms. This unit is designed to fit most standard windows and features an easy installation kit for a hassle-free setup. With a 115V/60Hz AC, it has a cooling capacity of up to 150 Sq. Ft and is available in a stylish white color.

This window unit offers powerful cooling performance and is built with energy efficiency in mind. It features two cooling and fan speeds, a 24-hour timer, and a programmable thermostat to help maintain the ideal temperature. Additionally, it has a digital display for easy monitoring and control, plus an easy-to-clean air filter for optimal air quality.

The ROVSUN 5000 BTU Window Air Conditioner is a great choice for those looking for an efficient and reliable cooling solution for their home or office. It’s easy to install, energy efficient, and comes with a range of convenient features to make operating it a breeze. Overall, this is a great option for anyone in need of a window air conditioner.