The best air conditioner for horizontal sliding windows is an essential appliance for cool comfort in homes that feature this window type. With various models available, selecting the right one requires careful consideration, especially given the unique design of sliding windows. In this guide, we will review the top 10 air conditioners that fit horizontally sliding windows available on Amazon in 2024.
Bestseller No. 1
Soleus Air Sliding Window Kit, Reinforced Aluminum Works Exclusive with the Soleus Over The Sill (Saddle) Air Conditioner (Air Conditioner Not Included)
- ADJUSTABLE TO SIZE - Suitable for all Soleus Air Exclusive Hybrid “Saddle” Air Conditioners. Hybrid air conditioner window seal kit for horizontal sliding windows is adjustable and can be customized to fit most horizontal gliding window sizes. It fits horizontal sliding windows (both single and double hung windows) from a minimum height of 23.5 inches to a max height of 43 inches. Easily lock the strong aluminum frame in place with the tightening of the screws.
- EASY TO INSTALL no drilling or difficult installation process. Just measure the height of your window with the Hybrid AC installed, attach the two panels with the 4 screws to the desired height, install the foam insulation around all four edges, place the panels in the window and enjoy your view outside!
- KEEP THE VIEW – With the Horizontal sliding window kit you can always enjoy the view outside or enjoy the natural light through the high quality plexiglass while still maintaining the high efficiency of the Hybrid AC unit.
- NO TOOLS REQUIRED- Everything needed for the Horizontal Sliding Window Kit comes in the box as the full kit. No need for extra tools or equipment. Ready for immediate installation.
- ENERGY EFFICIENT- The window kit will include high quality insulation that will wrap around the full window kit for a tight seal for enhanced energy efficiency.
Bestseller No. 2
Perfect Aire 10,000 BTU Slider Air Conditioner Window A/C - Casement, 10000, Gray
- Adjustable temperature settings that range 62°F - 86°F (17°C - 30°C); cools areas between 400-450 sq. ft.
- Expandable window mounting kit accommodates horizontal sliding or crank-out casement windows with a 15½”/16¼” (min./max.) window width and a 21¼”/39½” (min./max.) window height
- 3-speeds in both cool and fan modes
- Full function remote control with Follow Me portable thermostat technology for total room coverage
- Front-mounted, tilt-out air filter access for easing cleaning
Bestseller No. 3
Keystone 8,000 BTU Slider Window Air Conditioner and Dehumidifier, 115V Air Conditioner Window Unit for Bedroom, Living Room, and Small-Medium Sized Rooms up to 350 Sq.Ft., 4-Way Air Direction Control
- Convenient Cooling: This Keystone slider window air conditioner fits your standard sliding and casement windows; It is rated 8,000 BTUs and best used in a room up to 350 square feet
- Maximum Comfort: Featuring 3 cooling modes, 3 fan speeds, 4-way adjustable air louvers and a programmable timer; Aside from cooling, 0.9 liters of moisture from the air is removed every hour with the built-in dehumidification system
- Control Your Comfort: 4-way air direction control allows you to direct the air where you need it most for optimal comfort
- Powerful Cooling on a Budget: Our window air conditioner will give your electric bill a break by using the 'Energy Saver' or 'Sleep' mode; These features automatically program your unit to use less energy
- Easy to Use: Designed with a removable chassis so you can install it either in a window or through an exterior wall; An adjustable window kit is included for convenient installation; Minimum window height: 21.3"; Minimum to Maximum window width: 15.5" to 16.3"
Bestseller No. 4
Midea 8,000 BTU Smart Inverter Air Conditioner Window Unit with Heat and Dehumidifier – Cools up to 350 Sq. Ft., Energy Star Rated, Quiet Operation, Electronic Controls, Remote Control, White
- Multi-Season Comfort - Midea 8000 BTU window air conditioner with heat is better than standard ac units. It will beat the heat in summer with powerful cooling and dehumidification and keep you warm through the fall with supplemental heat. Best for large rooms up to 350 square feet. NOTE: heat pump function works when outside temp> 41°F.
- Easy To Use – This air conditioner and heat unit comes with an LED display, 5 Modes (Heat, Auto, Cool, Dry, Fan), 3 speed settings (Auto/H/M/L), 24-hr Timer, and ECO energy saver. The Swing button adjusts the louvers up/down to direct the airflow. Wireless control enabled window ac with heat unit from anywhere with the SmartHome App, or with your voice via Alexa and Google Assistant. All functions can be set via the control panel, remote control, and app or voice assistant.
- Save Energy Being Cool – Save on energy costs and enjoy ultimate comfort with this energy star certified unit. This energy efficient air conditioner unit is engineered with variable-speed inverter technology that will quickly cool your bedroom or apartment space while using considerably less electricity; up to 35% energy savings compared to the Energy Conservation Standard. Washable filter is easily accessed from front panel for regular cleaning to maintain peak performance.
- Ultra Low Noise Performance – This ac window unit operates at a noise level as low as 45 dBA. It’s such a quiet air conditioner that you will barely notice it, even when it’s on high. Enjoy your Zoom call, watch your favorite TV show, have a conversation. This ac unit for bedroom also creates just the right amount of white noise so you can get some rest.
- Install Specs – This window air conditioner is designed to fit double hung windows with opening widths of 24 to 38.5 inches. Lower sash must open sufficiently to allow a clear vertical opening of 14.5 inches. AC window unit measures 19.41"W x 22.17"D x 13.9"H. Included components: 8000 btu window air conditioner, remote control, installation kit. This ac heater combo window unit is as a close as you can get to a mini split a/c. You may like it so much you just might buy two!
Bestseller No. 5
Midea 8,000 BTU U Shaped Smart Inverter Window Air Conditioner - Cools 350 Sq Ft, Ultra Quiet with Open Window Flexibility - Alexa/Google Assistant Compatible - 37% Energy Savings, Remote (Updated)
- ULTRA QUIET - The U-shape design of Midea U Smart Inverter air conditioner uses your window to block noise outside. The highly-efficient inverter system warrants ultra-low noise and vibration, 10x quieter than traditional units with operation as low as 32 dBA. Cooling Watts: 710W, Rated Cooling Amps (AHAM): 8.78.Airflow (CFM) Roomside (hi low): 215/150. Refrigerant: R32.
- MORE THAN 37% ENERGY SAVINGS - With the advanced DC Inverter technology, Midea U window air conditioner achieves over 35% energy savings compared to other traditional units. It is the first window AC to obtain the ENERGY STAR Certification.
- SMART CONTROL - Midea U Smart Inverter air conditioner is Wi-Fi enabled and can be controlled from anywhere using the SmartHome app on iOS or Android. You can also use voice commands throughout your house, office, or apartment using Alexa or Google Assistant devices.
- FLEXIBLE WINDOW OPENING - The U-shaped design allows your window to open, bringing fresh air into your home and maintaining more of your view when the window air conditioner is installed. When the window is closed, the Anti-Theft Mechanism locks the window for added safety.
- ROBUST INSTALLATION - Install the included quick-snap bracket, set the air conditioner on the bracket, and secure the sidearms. Then you are all done and ready to enjoy. Available for single-hung or double-hung windows with width 22"-36", minimal height at 13.75".
Bestseller No. 6
Portable Air conditioner Window Kit, Adjustable Vertical/Horizontal Sliding Window Kit Plate for Unit, AC Window Vent Seal Suitable for 5.9” AC Exhaust Hose
- WINDOW KIT: UNAOIWN AC window vent kit includes 4 plates, 5.9 diameter duck coupler, a filter, 4 screw accessories (THIS KIT WITHOUT AC HOSE AND A/C UNIT). It applies to air conditioning 5.9inch vent hose (whether it is a clockwise or counterclockwise air-conditioning exhaust hose). Great for most portable air conditioners in the market.
- DURABLE MATERIALS: UNAOIWN window seal kit is made of high-quality PVC, which anti-extrusion, anti-aging, and can be used year after year. Simple and stable fixing method for install and disassemble easily, suit for using in home or office. Easy to store, and save space.
- VERTICAL & HORIZONTAL USE: It is suitable for most vertical and horizontal sliding window. You can make any combination according to the size of the window: use a 2-board combination, a 3-board combination or a 4-board combination. It is convenient to use in any place. No tools required, our AC exhaust kit is easy to slide the sealing plate and quickly lock. Adjustable length range: 17 inches or 27inch to 65 inches.
- EXCELLENT SEALING PERFORMANCE: There is a gap between the fixed plate and the adjustable plate because the adjustable plate needs to be inserted into the fixed plate. Therefore, the SEALING STRIP IS A MUST. Our air conditioner sealing plate set includes a 3.5M sealing strip; The sealing strip is attached to the connection between the sliding window and the plate, which can keep your room cool at all times, effectively isolate the hot air from entering and save power.
- EXCELLENT USER GUIDE SERVICE: We are committed to solving any problems that may occur. 24 hours online customer service, so that you are 100% satisfied. Please feel free to buy any goods from us.
Bestseller No. 7
Amazon Basics 5000-BTU Window Air Conditioner with Quiet Operation, Up to 150 Sqf, Cool and Fan Functions, Washable Filter, Adjustable Window Kit, Intuitive Mechanical Controls, for Small Room, White
- EFFICIENT COOLING: 5000 BTU cooling capacity ideal for rooms up to 150 sq. ft. - perfect for bedrooms, home offices, or small living spaces. Two-in-one functionality with cooling and fan-only modes
- SMART MAINTENANCE: Equipped with an easy-access, washable filter that captures dust and allergens.
- CUSTOMIZABLE COMFORT: Features 7 precise temperature settings, 2-speed cooling and fan modes, and 2-way air direction control for personalized comfort
- QUIET OPERATION: Low noise level up to 56 dB creates a peaceful environment suitable for sleeping and working
- QUICK INSTALLATION: Fits standard windows 23"-36" wide and minimum 13" high. Comes with expandable side panels and complete mounting kit. Basic tools required for installation (screwdriver not included)
Bestseller No. 8
Kxuhivc Portable Air Conditioner Window Vent Kit, Adjustable Window Seal with 5.9 Inch Diameter, 59 Inch Length Exhaust Hose for A/C Unit Universal for Sliding Horizontal or Vertical Window
- ANTI-CLOCKWISE UNIVERSAL FIT: Our AC exhaust hose has an anti-clockwise thread direction so make sure to check this is correct for your AC before purchasing. The diameter of our AC hose is 5.9 inches, the length has two options for 1.5m/59" and 2m/78.7" respectively, which means it can fit most portable air conditioners on the market.
- DURABLE & WIDE COMPATIBILITY: The window vent kit for portable AC unit consists of four plates, is made of durable PVC materials, recommended max extend length 162cm/64Inch, light weight, portable, suit for using in home or office.
- EASY TO INSTALL: Just set the plate panels together and slide them to the desired length, and then lock with screws. Attach one side of exhaust hose to the air conditioner hose connector by rotating; Attach another side of hose to the adaptor. Finally insert to the plates.
- GOOD SEALING: There is gap between fixing plate and adjustable plate, because of adjustable plate narrower than fixing plate. So come with dealing tape, it is posted at the connection between the sliding door and the sealing plate, which effectively isolates hot air from entering the room and fixed every plate.
- PACKAGE INCLUDES: 1 x Exhaust Hose (Dia15cm/5.9Inch), 1 x Exhaust Hose Adaptor, 2 x 43cm/17Inch Fixing Outer Plates, 2 x 43cm/17Inch Adjustable Inner Plates, 3 x Screws, 1 x Sealing Tapes, please check your sliding door size before buying. If you have any problems, please feel free to contact us.
Bestseller No. 9
Frigidaire 6,000 BTU Window Air Conditioner with Remote Control, Cools Up to 250 Sq. Ft., Quiet Operation, Eco Mode, 3 Fan Speeds, Auto Restart, White
- Customizable Cooling: Achieve optimal comfort with custom temperature settings, 6-way directional airflow, and three different fan speeds
- Easy Maintenance: Effortlessly adjust settings with the remote control and keep your AC unit working efficiently with Clean Filter alerts that notify you when it's time to clean the washable dust filter
- Energy-Efficient Performance: Save energy with Eco Mode while maintaining a comfortable temperature and reduce energy consumption with Sleep Mode, which gradually increases the temperature overnight
- Consistent Comfort: This window air conditioner operates at just 52 dBA, providing quiet cooling that makes it ideal for bedrooms or small spaces up to 250 sq. ft.
- Effortless Convenience: Set the 24-hour on/off timer to match your schedule and enable Dry Mode to remove excess moisture from the air, creating a more comfortable environment
Bestseller No. 10
Portable AC Window Vent Kit with Universal Coupler for 5.1"/5.9" Exhaust Hose, Upgraded Mobile Air Conditioner Window Seal Kit with 4 Adjustable Seal Panels for Horizontal & Vertical Sliding Windows
- 【Universal Coupler for 5.1 inch & 5.9 inch Exhaust Hose】: This 2-in-1 patented coupler has an Internal thread suitable for exhaust hoses with a diameter of 5.1 inches (clockwise and counterclockwise), and an External thread suitable for exhaust hoses with a diameter of 5.9 inches (counterclockwise only). You can easily connect all your air conditioning hoses without hassle. (Hose not included)
- 【Upgraded Seamless, Better Sealing Effect】: The portable air conditioner window vent kit can be perfectly embedded in windows rail to achieve a tight sealing effect. There is no gaps between the plate and the edge of the window, effectively blocking the leakage of cold air and the entry of hot air into the room, keeping the room cool and more energy-efficient.
- 【Grid Filter & Rain Cover】: The universal coupling has a built-in grid to prevent birds, mice, snakes and garbage from entering the AC vent hose and damaging your air conditioner components. The rain cover can effectively prevent rain and wind from entering, and let the hot air escape downward, allowing you to better enjoy the convenience of our air conditioner window vent kit.
- 【Thickened and Durable Adjustable Panels】: The maximum adjustable length of the 4 window panels is 155cm/61 inches, meeting the needs of different window heights and suitable for most horizontal and vertical sliding Windows. Our AC unit window kit is made of a new reinforced PVC material, featuring superior heat resistance, wear resistance, aging resistance and durability. It has a longer service life and can be reused repeatedly.
- 【What You Get】: The portable AC duct kit includes 4 x Window Seal Plates, 4 x Screws, 1 x Universal Hose Adapter with Grid, 1 x Rain Cover, 1 x Sealing Tape, 1 x User Manual. All accessories are easy to install or disassemble, no tool needed, convenient to store when not in use, and save space.
Buying Guide for the Best Air Conditioner for Horizontal Sliding Windows
When searching for the best air conditioner for horizontal sliding windows, shoppers should consider several factors:
1. Window Dimensions
First and foremost, assess your window size. Air conditioners are designed for specific measurements, so it’s vital to select one that fits securely in your horizontal sliding window without gaps.
2. Cooling Capacity
Cooling capacity is measured in BTUs (British Thermal Units). The higher the BTU, the more powerful the unit. Consider your room’s size to determine the required BTU. An overpowered unit can lead to unnecessary energy consumption, while an underpowered unit struggles to cool the space effectively.
3. Energy Efficiency
Look for units with a high Energy Efficiency Ratio (EER). Higher EER ratings indicate lower energy consumption, which saves money on utility bills in the long run.
4. Noise Level
Pay attention to the noise level in decibels (dB). Quieter units are preferable, especially for bedrooms or living areas where silence is valued. Consider models equipped with sound-dampening technology.
5. Installation Options
Check for easy installation options, as not all units are designed for horizontal sliding windows. Some manufacturers provide kits that assist in the setup process, ensuring a proper fit.
6. Smart Features
Modern air conditioners come equipped with smart features like app control, Wi-Fi connectivity, and programmable timers. These features can enhance convenience and energy savings.
7. Brand and Warranty
Opt for reputable brands known for quality products and good customer service. A solid warranty can also provide peace of mind in case of defects or issues.
Top 10 Air Conditioners for Horizontal Sliding Windows
Now, let’s explore the top 10 air conditioners that cater to horizontal sliding windows available on Amazon in 2024.
1. LG LW8016ER 8,000 BTU Window Air Conditioner
LG’s LW8016ER is a highly rated window air conditioner that provides efficient cooling for rooms up to 350 square feet. It features a 24-hour programmable timer and a remote control for added convenience. The unit also includes multiple cooling options and fan speeds.
This energy-efficient air conditioner boasts an EER of 12.1 and is equipped with an adjustable air vent that directs airflow for optimal comfort. The sleek design ensures it fits well with horizontal sliding windows. Many users have praised its low noise levels, making it perfect for quiet nights.
Bestseller No. 1
LG 8,000 BTU Window Air Conditioner, 115V, Cools 340 Sq.Ft. for Bedroom, Living Room, Apartment, Quiet Operation, Electronic Control with Remote, 3 Cooling & Fan Speeds, Auto Restart, White
- Included Components: Air Conditioner, Remote Control, Mesh Filter, Installation Kit, Manual/Installation Instructions, Warranty.wattage : 660 watts.
2. Midea MAW08R1BWT 8,000 BTU Window Air Conditioner
The Midea MAW08R1BWT is another excellent choice for horizontal sliding windows. This model offers powerful cooling capabilities for spaces up to 350 square feet and operates quietly for comfort. The EER rating of 12.1 ensures it’s energy-efficient.
What sets this unit apart is its easy installation process and adjustable fan speeds, allowing you to customize the cooling experience. Users appreciate the smart control feature via the Midea app, which enables control from anywhere.
Bestseller No. 1
Midea 8,000 BTU EasyCool Window Air Conditioner, Dehumidifier and Fan - Cool, Circulate and Dehumidify up to 350 Sq. Ft., Reusable Filter, Remote Control
- 3 IN 1 COMFORT - The Midea EasyCool Window Air Conditioner unit has three modes to help your house, apartment, office, or room be as comfortable as possible. It can cool a space up to 350 sq. ft. quickly, circulate air with its 3-speed fan, or reduce humidity utilizing the dehumidifier mode.Controller type:Remote Control.Air Flow efficiency:196.47 CFM.core material : Copper
- ENERGY EFFICIENT - The EasyCool window air conditioner help save you money throughout the year. There is also multiple custom settings to help you be even more energy efficient like Eco mode and an EasyTimer feature to program a schedule that fits your needs.
- QUIET & EASY TO USE - This window AC unit is quieter than a household refrigerator. The intuitive LED display and remote control (batteries included) allow easy setting of time, temperature, and mode from across the room. The removable and reusable air filter protects your family and living space from dust and pet hairs.
- EASY INSTALLATION - Install easily in your home or apartment's existing window frame (23"-36"x14"). All mounting accessories are included. A screwdriver is required (but not included) for installation. For some window frames, pilot holes are recommended before installing screws. Installation instructions are simple and setting it up is a breeze.
- WORLDWIDE LEADER - Midea is the air treatment brand with a motto to help make customers feel at home with each of their products. As a testament to our dedication to quality and our customers, we offer one-year parts and labor warranty on this product.
3. Frigidaire FFRE083ZA1 8,000 BTU Window Air Conditioner
The Frigidaire FFRE083ZA1 is designed to cool rooms up to 350 square feet and features a low-profile, sleek design. With multiple cooling settings and a programmable timer, it’s both flexible and user-friendly.
This air conditioner also boasts an EER of 12.0, helping to reduce energy costs throughout the summer months. Its quiet operation makes it a favorite for bedrooms. Users have noted its effectiveness in quickly cooling spaces.
No products found.
4. Emerson Quiet Kool EARC8RE1 8,000 BTU Window Air Conditioner
With a focus on minimal noise, the Emerson Quiet Kool EARC8RE1 is perfect for spaces up to 350 square feet. Its energy-efficient operation (EER of 12.1) is complemented by several fan settings and cooling modes, providing customizable comfort.
The unit includes a remote control and easy installation kit designed specifically for horizontal sliding windows, making setup a breeze. Users have praised how quietly it operates, making it ideal for nighttime use.
No products found.
5. BLACK+DECKER BPACT08WT 8,000 BTU Portable Air Conditioner
While technically a portable model, the BLACK+DECKER BPACT08WT offers flexible cooling options and can be used in horizontal sliding windows with an installation kit. Ideal for smaller rooms (about 200 square feet), this unit is portable and easy to relocate.
Its EER rating of 8.0 is lower than some of the stationary options but still respectable for this portability. The unit also features a dehumidifier mode, which is perfect for humid climates.
No products found.
6. Hisense AP08HR1SEJR 8,000 BTU Portable Air Conditioner
This Hisense model combines cooling and heating, made for year-round comfort. It’s effective for areas up to 350 square feet and offers multiple modes, including dehumidifying functions.
With an EER of 9.0, it is less efficient compared to stationary air conditioners, but the versatility of moving it around makes it a feasible alternative for those without adjustable horizontal window options.
No products found.
7. TOSOT 8,000 BTU Window Air Conditioner
The TOSOT 8,000 BTU Window Air Conditioner is built to cool rooms efficiently. With an EER of 12.0, this unit is designed with energy conservation in mind. Its sleek design allows it to fit securely in horizontal sliding windows while maintaining a stylish appearance.
Users often share their satisfaction with the unit’s quiet operation, direct air flow, and quick cooling abilities. The built-in dehumidifier mode adds another layer of comfort during hot summer days.
Bestseller No. 1
Midea 8,000 BTU Smart Inverter Air Conditioner Window Unit with Heat and Dehumidifier – Cools up to 350 Sq. Ft., Energy Star Rated, Quiet Operation, Electronic Controls, Remote Control, White
- Multi-Season Comfort - Midea 8000 BTU window air conditioner with heat is better than standard ac units. It will beat the heat in summer with powerful cooling and dehumidification and keep you warm through the fall with supplemental heat. Best for large rooms up to 350 square feet. NOTE: heat pump function works when outside temp> 41°F.
- Easy To Use – This air conditioner and heat unit comes with an LED display, 5 Modes (Heat, Auto, Cool, Dry, Fan), 3 speed settings (Auto/H/M/L), 24-hr Timer, and ECO energy saver. The Swing button adjusts the louvers up/down to direct the airflow. Wireless control enabled window ac with heat unit from anywhere with the SmartHome App, or with your voice via Alexa and Google Assistant. All functions can be set via the control panel, remote control, and app or voice assistant.
- Save Energy Being Cool – Save on energy costs and enjoy ultimate comfort with this energy star certified unit. This energy efficient air conditioner unit is engineered with variable-speed inverter technology that will quickly cool your bedroom or apartment space while using considerably less electricity; up to 35% energy savings compared to the Energy Conservation Standard. Washable filter is easily accessed from front panel for regular cleaning to maintain peak performance.
- Ultra Low Noise Performance – This ac window unit operates at a noise level as low as 45 dBA. It’s such a quiet air conditioner that you will barely notice it, even when it’s on high. Enjoy your Zoom call, watch your favorite TV show, have a conversation. This ac unit for bedroom also creates just the right amount of white noise so you can get some rest.
- Install Specs – This window air conditioner is designed to fit double hung windows with opening widths of 24 to 38.5 inches. Lower sash must open sufficiently to allow a clear vertical opening of 14.5 inches. AC window unit measures 19.41"W x 22.17"D x 13.9"H. Included components: 8000 btu window air conditioner, remote control, installation kit. This ac heater combo window unit is as a close as you can get to a mini split a/c. You may like it so much you just might buy two!
8. Koldfront WAC12001R 12,000 BTU Window Air Conditioner
If you’re looking for more robust cooling, the Koldfront WAC12001R offers a powerful 12,000 BTU cooling capacity. This model will effectively cool rooms up to 550 square feet and comes with multiple cooling and fan settings for customized comfort.
Although it’s larger and may require a more robust installation technique, it is rated for energy savings. Users love its effectiveness in reducing humidity and cooling large spaces quickly.
No products found.
9. Haier ESAQ406T Serenity 6,000 BTU Air Conditioner
For smaller spaces, the Haier ESAQ406T Serenity is a great solution. With a cooling capacity of 6,000 BTUs, this model is effective for spaces up to 250 square feet, perfect for bedrooms or small living areas. Its EER rating of 14.0 makes it one of the most energy-efficient options available.
Furthermore, the ultra-quiet performance means it can be used in bedroom settings without disrupting sleep. Many users appreciate its sleek design and ease of installation.
Bestseller No. 1
Frigidaire 6,000 BTU Window Air Conditioner with Remote Control, Cools Up to 250 Sq. Ft., Quiet Operation, Eco Mode, 3 Fan Speeds, Auto Restart, White
- Customizable Cooling: Achieve optimal comfort with custom temperature settings, 6-way directional airflow, and three different fan speeds
- Easy Maintenance: Effortlessly adjust settings with the remote control and keep your AC unit working efficiently with Clean Filter alerts that notify you when it's time to clean the washable dust filter
- Energy-Efficient Performance: Save energy with Eco Mode while maintaining a comfortable temperature and reduce energy consumption with Sleep Mode, which gradually increases the temperature overnight
- Consistent Comfort: This window air conditioner operates at just 52 dBA, providing quiet cooling that makes it ideal for bedrooms or small spaces up to 250 sq. ft.
- Effortless Convenience: Set the 24-hour on/off timer to match your schedule and enable Dry Mode to remove excess moisture from the air, creating a more comfortable environment
10. Whirlpool W5WACW05 5,000 BTU Window Air Conditioner
Lastly, the Whirlpool W5WACW05 is ideal for very small spaces needing minimal cooling. Rated for areas around 150 square feet, this is one of the most economical air conditioners available. Although its BTU rating is low, it’s perfect for focused cooling.
Its simple controls and compact size make it user-friendly, and it fits snugly in horizontal sliding windows. Keep in mind the lower EER rating, but it’s an excellent value for occasional use.
No products found.
Conclusion
In 2024, there are numerous options available for homeowners seeking the best air conditioners for horizontal sliding windows. From efficient cooling units capable of handling larger spaces to portable options that offer year-round versatility, there’s something for everyone. Prioritize features like EER ratings, noise levels, and installation ease to find the best fit for your needs. By considering the above recommendations, you are sure to find a unit that enhances your home’s comfort and maintains a restful atmosphere.
Bestseller No. 1
Soleus Air Sliding Window Kit, Reinforced Aluminum Works Exclusive with the Soleus Over The Sill (Saddle) Air Conditioner (Air Conditioner Not Included)
- ADJUSTABLE TO SIZE - Suitable for all Soleus Air Exclusive Hybrid “Saddle” Air Conditioners. Hybrid air conditioner window seal kit for horizontal sliding windows is adjustable and can be customized to fit most horizontal gliding window sizes. It fits horizontal sliding windows (both single and double hung windows) from a minimum height of 23.5 inches to a max height of 43 inches. Easily lock the strong aluminum frame in place with the tightening of the screws.
- EASY TO INSTALL no drilling or difficult installation process. Just measure the height of your window with the Hybrid AC installed, attach the two panels with the 4 screws to the desired height, install the foam insulation around all four edges, place the panels in the window and enjoy your view outside!
- KEEP THE VIEW – With the Horizontal sliding window kit you can always enjoy the view outside or enjoy the natural light through the high quality plexiglass while still maintaining the high efficiency of the Hybrid AC unit.
- NO TOOLS REQUIRED- Everything needed for the Horizontal Sliding Window Kit comes in the box as the full kit. No need for extra tools or equipment. Ready for immediate installation.
- ENERGY EFFICIENT- The window kit will include high quality insulation that will wrap around the full window kit for a tight seal for enhanced energy efficiency.
Bestseller No. 2
Perfect Aire 10,000 BTU Slider Air Conditioner Window A/C - Casement, 10000, Gray
- Adjustable temperature settings that range 62°F - 86°F (17°C - 30°C); cools areas between 400-450 sq. ft.
- Expandable window mounting kit accommodates horizontal sliding or crank-out casement windows with a 15½”/16¼” (min./max.) window width and a 21¼”/39½” (min./max.) window height
- 3-speeds in both cool and fan modes
- Full function remote control with Follow Me portable thermostat technology for total room coverage
- Front-mounted, tilt-out air filter access for easing cleaning
Bestseller No. 3
Keystone 8,000 BTU Slider Window Air Conditioner and Dehumidifier, 115V Air Conditioner Window Unit for Bedroom, Living Room, and Small-Medium Sized Rooms up to 350 Sq.Ft., 4-Way Air Direction Control
- Convenient Cooling: This Keystone slider window air conditioner fits your standard sliding and casement windows; It is rated 8,000 BTUs and best used in a room up to 350 square feet
- Maximum Comfort: Featuring 3 cooling modes, 3 fan speeds, 4-way adjustable air louvers and a programmable timer; Aside from cooling, 0.9 liters of moisture from the air is removed every hour with the built-in dehumidification system
- Control Your Comfort: 4-way air direction control allows you to direct the air where you need it most for optimal comfort
- Powerful Cooling on a Budget: Our window air conditioner will give your electric bill a break by using the 'Energy Saver' or 'Sleep' mode; These features automatically program your unit to use less energy
- Easy to Use: Designed with a removable chassis so you can install it either in a window or through an exterior wall; An adjustable window kit is included for convenient installation; Minimum window height: 21.3"; Minimum to Maximum window width: 15.5" to 16.3"
Bestseller No. 4
Midea 8,000 BTU Smart Inverter Air Conditioner Window Unit with Heat and Dehumidifier – Cools up to 350 Sq. Ft., Energy Star Rated, Quiet Operation, Electronic Controls, Remote Control, White
- Multi-Season Comfort - Midea 8000 BTU window air conditioner with heat is better than standard ac units. It will beat the heat in summer with powerful cooling and dehumidification and keep you warm through the fall with supplemental heat. Best for large rooms up to 350 square feet. NOTE: heat pump function works when outside temp> 41°F.
- Easy To Use – This air conditioner and heat unit comes with an LED display, 5 Modes (Heat, Auto, Cool, Dry, Fan), 3 speed settings (Auto/H/M/L), 24-hr Timer, and ECO energy saver. The Swing button adjusts the louvers up/down to direct the airflow. Wireless control enabled window ac with heat unit from anywhere with the SmartHome App, or with your voice via Alexa and Google Assistant. All functions can be set via the control panel, remote control, and app or voice assistant.
- Save Energy Being Cool – Save on energy costs and enjoy ultimate comfort with this energy star certified unit. This energy efficient air conditioner unit is engineered with variable-speed inverter technology that will quickly cool your bedroom or apartment space while using considerably less electricity; up to 35% energy savings compared to the Energy Conservation Standard. Washable filter is easily accessed from front panel for regular cleaning to maintain peak performance.
- Ultra Low Noise Performance – This ac window unit operates at a noise level as low as 45 dBA. It’s such a quiet air conditioner that you will barely notice it, even when it’s on high. Enjoy your Zoom call, watch your favorite TV show, have a conversation. This ac unit for bedroom also creates just the right amount of white noise so you can get some rest.
- Install Specs – This window air conditioner is designed to fit double hung windows with opening widths of 24 to 38.5 inches. Lower sash must open sufficiently to allow a clear vertical opening of 14.5 inches. AC window unit measures 19.41"W x 22.17"D x 13.9"H. Included components: 8000 btu window air conditioner, remote control, installation kit. This ac heater combo window unit is as a close as you can get to a mini split a/c. You may like it so much you just might buy two!
Bestseller No. 5
Midea 8,000 BTU U Shaped Smart Inverter Window Air Conditioner - Cools 350 Sq Ft, Ultra Quiet with Open Window Flexibility - Alexa/Google Assistant Compatible - 37% Energy Savings, Remote (Updated)
- ULTRA QUIET - The U-shape design of Midea U Smart Inverter air conditioner uses your window to block noise outside. The highly-efficient inverter system warrants ultra-low noise and vibration, 10x quieter than traditional units with operation as low as 32 dBA. Cooling Watts: 710W, Rated Cooling Amps (AHAM): 8.78.Airflow (CFM) Roomside (hi low): 215/150. Refrigerant: R32.
- MORE THAN 37% ENERGY SAVINGS - With the advanced DC Inverter technology, Midea U window air conditioner achieves over 35% energy savings compared to other traditional units. It is the first window AC to obtain the ENERGY STAR Certification.
- SMART CONTROL - Midea U Smart Inverter air conditioner is Wi-Fi enabled and can be controlled from anywhere using the SmartHome app on iOS or Android. You can also use voice commands throughout your house, office, or apartment using Alexa or Google Assistant devices.
- FLEXIBLE WINDOW OPENING - The U-shaped design allows your window to open, bringing fresh air into your home and maintaining more of your view when the window air conditioner is installed. When the window is closed, the Anti-Theft Mechanism locks the window for added safety.
- ROBUST INSTALLATION - Install the included quick-snap bracket, set the air conditioner on the bracket, and secure the sidearms. Then you are all done and ready to enjoy. Available for single-hung or double-hung windows with width 22"-36", minimal height at 13.75".
Bestseller No. 6
Portable Air conditioner Window Kit, Adjustable Vertical/Horizontal Sliding Window Kit Plate for Unit, AC Window Vent Seal Suitable for 5.9” AC Exhaust Hose
- WINDOW KIT: UNAOIWN AC window vent kit includes 4 plates, 5.9 diameter duck coupler, a filter, 4 screw accessories (THIS KIT WITHOUT AC HOSE AND A/C UNIT). It applies to air conditioning 5.9inch vent hose (whether it is a clockwise or counterclockwise air-conditioning exhaust hose). Great for most portable air conditioners in the market.
- DURABLE MATERIALS: UNAOIWN window seal kit is made of high-quality PVC, which anti-extrusion, anti-aging, and can be used year after year. Simple and stable fixing method for install and disassemble easily, suit for using in home or office. Easy to store, and save space.
- VERTICAL & HORIZONTAL USE: It is suitable for most vertical and horizontal sliding window. You can make any combination according to the size of the window: use a 2-board combination, a 3-board combination or a 4-board combination. It is convenient to use in any place. No tools required, our AC exhaust kit is easy to slide the sealing plate and quickly lock. Adjustable length range: 17 inches or 27inch to 65 inches.
- EXCELLENT SEALING PERFORMANCE: There is a gap between the fixed plate and the adjustable plate because the adjustable plate needs to be inserted into the fixed plate. Therefore, the SEALING STRIP IS A MUST. Our air conditioner sealing plate set includes a 3.5M sealing strip; The sealing strip is attached to the connection between the sliding window and the plate, which can keep your room cool at all times, effectively isolate the hot air from entering and save power.
- EXCELLENT USER GUIDE SERVICE: We are committed to solving any problems that may occur. 24 hours online customer service, so that you are 100% satisfied. Please feel free to buy any goods from us.
Bestseller No. 7
Amazon Basics 5000-BTU Window Air Conditioner with Quiet Operation, Up to 150 Sqf, Cool and Fan Functions, Washable Filter, Adjustable Window Kit, Intuitive Mechanical Controls, for Small Room, White
- EFFICIENT COOLING: 5000 BTU cooling capacity ideal for rooms up to 150 sq. ft. - perfect for bedrooms, home offices, or small living spaces. Two-in-one functionality with cooling and fan-only modes
- SMART MAINTENANCE: Equipped with an easy-access, washable filter that captures dust and allergens.
- CUSTOMIZABLE COMFORT: Features 7 precise temperature settings, 2-speed cooling and fan modes, and 2-way air direction control for personalized comfort
- QUIET OPERATION: Low noise level up to 56 dB creates a peaceful environment suitable for sleeping and working
- QUICK INSTALLATION: Fits standard windows 23"-36" wide and minimum 13" high. Comes with expandable side panels and complete mounting kit. Basic tools required for installation (screwdriver not included)
Bestseller No. 8
Kxuhivc Portable Air Conditioner Window Vent Kit, Adjustable Window Seal with 5.9 Inch Diameter, 59 Inch Length Exhaust Hose for A/C Unit Universal for Sliding Horizontal or Vertical Window
- ANTI-CLOCKWISE UNIVERSAL FIT: Our AC exhaust hose has an anti-clockwise thread direction so make sure to check this is correct for your AC before purchasing. The diameter of our AC hose is 5.9 inches, the length has two options for 1.5m/59" and 2m/78.7" respectively, which means it can fit most portable air conditioners on the market.
- DURABLE & WIDE COMPATIBILITY: The window vent kit for portable AC unit consists of four plates, is made of durable PVC materials, recommended max extend length 162cm/64Inch, light weight, portable, suit for using in home or office.
- EASY TO INSTALL: Just set the plate panels together and slide them to the desired length, and then lock with screws. Attach one side of exhaust hose to the air conditioner hose connector by rotating; Attach another side of hose to the adaptor. Finally insert to the plates.
- GOOD SEALING: There is gap between fixing plate and adjustable plate, because of adjustable plate narrower than fixing plate. So come with dealing tape, it is posted at the connection between the sliding door and the sealing plate, which effectively isolates hot air from entering the room and fixed every plate.
- PACKAGE INCLUDES: 1 x Exhaust Hose (Dia15cm/5.9Inch), 1 x Exhaust Hose Adaptor, 2 x 43cm/17Inch Fixing Outer Plates, 2 x 43cm/17Inch Adjustable Inner Plates, 3 x Screws, 1 x Sealing Tapes, please check your sliding door size before buying. If you have any problems, please feel free to contact us.
Bestseller No. 9
Frigidaire 6,000 BTU Window Air Conditioner with Remote Control, Cools Up to 250 Sq. Ft., Quiet Operation, Eco Mode, 3 Fan Speeds, Auto Restart, White
- Customizable Cooling: Achieve optimal comfort with custom temperature settings, 6-way directional airflow, and three different fan speeds
- Easy Maintenance: Effortlessly adjust settings with the remote control and keep your AC unit working efficiently with Clean Filter alerts that notify you when it's time to clean the washable dust filter
- Energy-Efficient Performance: Save energy with Eco Mode while maintaining a comfortable temperature and reduce energy consumption with Sleep Mode, which gradually increases the temperature overnight
- Consistent Comfort: This window air conditioner operates at just 52 dBA, providing quiet cooling that makes it ideal for bedrooms or small spaces up to 250 sq. ft.
- Effortless Convenience: Set the 24-hour on/off timer to match your schedule and enable Dry Mode to remove excess moisture from the air, creating a more comfortable environment
Bestseller No. 10
Portable AC Window Vent Kit with Universal Coupler for 5.1"/5.9" Exhaust Hose, Upgraded Mobile Air Conditioner Window Seal Kit with 4 Adjustable Seal Panels for Horizontal & Vertical Sliding Windows
- 【Universal Coupler for 5.1 inch & 5.9 inch Exhaust Hose】: This 2-in-1 patented coupler has an Internal thread suitable for exhaust hoses with a diameter of 5.1 inches (clockwise and counterclockwise), and an External thread suitable for exhaust hoses with a diameter of 5.9 inches (counterclockwise only). You can easily connect all your air conditioning hoses without hassle. (Hose not included)
- 【Upgraded Seamless, Better Sealing Effect】: The portable air conditioner window vent kit can be perfectly embedded in windows rail to achieve a tight sealing effect. There is no gaps between the plate and the edge of the window, effectively blocking the leakage of cold air and the entry of hot air into the room, keeping the room cool and more energy-efficient.
- 【Grid Filter & Rain Cover】: The universal coupling has a built-in grid to prevent birds, mice, snakes and garbage from entering the AC vent hose and damaging your air conditioner components. The rain cover can effectively prevent rain and wind from entering, and let the hot air escape downward, allowing you to better enjoy the convenience of our air conditioner window vent kit.
- 【Thickened and Durable Adjustable Panels】: The maximum adjustable length of the 4 window panels is 155cm/61 inches, meeting the needs of different window heights and suitable for most horizontal and vertical sliding Windows. Our AC unit window kit is made of a new reinforced PVC material, featuring superior heat resistance, wear resistance, aging resistance and durability. It has a longer service life and can be reused repeatedly.
- 【What You Get】: The portable AC duct kit includes 4 x Window Seal Plates, 4 x Screws, 1 x Universal Hose Adapter with Grid, 1 x Rain Cover, 1 x Sealing Tape, 1 x User Manual. All accessories are easy to install or disassemble, no tool needed, convenient to store when not in use, and save space.
Last update on 2026-03-14 / Affiliate links / Images from Amazon Product Advertising API | hishecozy.com is a participant in the Amazon Associate program and will earn from qualifying purchases.
