18 Best AC Units for Horizontal Sliding Windows Revealed

Discover the best AC unit for horizontal sliding window styles, expertly chosen to keep your space cool and comfortable with ease.
18 Best AC Units for Horizontal Sliding Windows Revealed

Top Quick Picks For You

Great Budget Performer

Midea EasyCool 5,000 BTU

Midea EasyCool 5,000 BTU

The Midea 5,000 BTU EasyCool Air Conditioner is affordably priced and effectively cools small rooms, making it a solid choice for budget-conscious consumers.

Best for Energy Efficiency

Soleus Air Window Kit

Soleus Air Window Kit

The Midea 8,000 BTU U-Shaped Smart Inverter Air Conditioner offers more than 35% energy savings and ultra-quiet operation, making it a great pick for energy efficiency.

Best for Small Rooms

Amazon Basics Air Conditioner

Amazon Basics Air Conditioner

The Amazon Basics 5,000 BTU Window Air Conditioner is ideal for cooling small spaces up to 150 sq. ft., making it a perfect choice for compact rooms.

Best for User-Friendly Setup

Dreo Portable AC

Dreo Portable AC

The Dreo Portable Air Conditioner features hassle-free DIY installation with universal window kits, allowing for quick and easy setup in any room.

Best Ac Unit for Horizontal Sliding Window

As the sun blazes and the heat intensifies, finding the ideal air conditioning unit for your horizontal sliding window can feel like a daunting task. Fear not, for we've distilled the overwhelming choices into a succinct guide that pairs innovation with comfort. Discover the best AC units designed to transform your living space into a refreshing oasis, all while effortlessly fitting into your home’s unique style.

Great Budget Performer: Midea EasyCool 5,000 BTU

Midea 5,000 BTU EasyCool Small Window Air Conditioner - Cool up to 150 Sq. Ft. with Easy-to-Use Mechanical Controls and Reusable Filter, Perfect for Small Bedroom, Living Room, Home Office
Highlights
Energy efficient operation
Quieter than competitors
Easy installation process

When it comes to finding an affordable air conditioning solution for smaller spaces, we couldn't be more impressed with the Midea 5,000 BTU EasyCool Air Conditioner .

This little powerhouse efficiently cools rooms up to 150 sq. ft., boasting 7 temperature settings and dual fan speeds to keep your space just the way you like it .

Plus, its impressive CEER of 11.0 means you'll save on energy bills without sacrificing comfort .

Installation is a breeze, and it's quieter than your fridge—seriously !

If you're after a budget-friendly, reliable option that delivers, look no further than Midea!

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Price history for Midea EasyCool 5,000 BTU on Amazon

Best for Energy Efficiency: Soleus Air Window Kit

Soleus Air Sliding Window Kit, Reinforced Aluminum Works Exclusive with the Soleus Over The Sill (Saddle) Air Conditioner (Air Conditioner Not Included)
Highlights
Adjustable size
Easy installation
Good energy efficiency

When it comes to finding the best AC unit for horizontal sliding windows, we can't help but shine a spotlight on the Soleus Air Hybrid Window Kit .

Not only is this kit adjustable to fit a wide range of window sizes—from 28.5 to 48 inches—but it also ensures easy installation without any tools !

Simply follow the straightforward instructions, and you’ll be enjoying a cool breeze in no time .

Plus, with its high-quality insulation, it keeps your space energy-efficient while letting you savor that lovely view .

It's a fantastic choice, even if it is somewhat on the pricey side!

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Price history for Soleus Air Window Kit on Amazon

Best for Small Rooms: Amazon Basics Air Conditioner

Amazon Basics Window Air Conditioner, 5000 BTU, Cools up to 150 Sq. Ft., White AC Unit, Mechanical Control
Highlights
Efficient cooling and dehumidifying
Easy maintenance and installation
Compact and versatile fit

When it comes to the Amazon Basics 5,000 BTU Window Air Conditioner, we believe it’s the ultimate solution for those cozy spaces .

Perfect for cooling areas up to 150 sq. ft., this little powerhouse not only keeps you cool but also dehumidifies the air, making those humid summer days feel a lot more bearable .

Installation is a breeze thanks to its adaptable side panels, and maintenance is as simple as pulling out the washable filter .

While it comes with a few basic features and does have a tendency to be a bit noisy, its efficient performance in small rooms more than makes up for it .

Just think of it as your compact comfort companion!

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Price history for Amazon Basics Air Conditioner on Amazon

Best for User-Friendly Setup: Dreo Portable AC

Dreo Portable Air Conditioners, 12,000 BTU AC Unit for Bedroom with Drainage-free Cooling, 46dB Quiet, APP/Voice/Remote, 24h Timer with Fan & Dehumidifier, Smart Air Conditioner for Room Indoors
Highlights
Powerful 12,000 BTU cooling
Quiet operation at 46 dB
Easy installation with kits

When it comes to finding the best AC unit for horizontal sliding windows, we confidently recommend the Dreo Portable Air Conditioner as our pick for "Best for User-Friendly Setup." This powerhouse boasts a cooling capacity of 12,000 BTU, thriving even in the sweltering heat .

With its 3-in-1 mode—cooling, dehumidifying, and fan control—you can easily customize your comfort .

Plus, the noise isolation system keeps it whisper-quiet at just 46 dB, making it perfect for bedrooms or offices .

And with DIY installation and universal window kits, setting it up is a breeze .

Get ready for a summer of comfort!

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Price history for Dreo Portable AC on Amazon

Coolblus Portable AC

8500 BTU Portable Air Conditioners Cool Up to 360 Sq.Ft,3 IN 1 portable ac unit with Remote Control/LED Display/24Hrs Timer/Window Installation Kit & Screwdriver,White
Highlights
3-in-1 functionality
Powerful cooling capacity
Easy installation and portability

The Coolblus portable air conditioner is our top pick for anyone seeking efficient cooling for horizontal sliding windows .

With its 3-in-1 functionality, this impressive unit offers cooling, dehumidifying, and fan modes—perfect for year-round comfort .

The 8500 BTU cooling capacity easily handles rooms up to 360 sq. ft., ensuring you stay comfortable even on the hottest days .

We love the drainage-free system, but keep in mind it may need manual drainage in high humidity .

The easy installation with 360° wheels allows for seamless movement, making it a breeze to set up in any room you desire.

Be sure to also check out the best oil for humidifier for more options! Also, here is the price history so you know exactly when to buy!

Price history for Coolblus Portable AC on Amazon

PerfectAire 10000

Perfect Aire 10,000 Slider Air Conditioner Window A/C-Casement, 10000 BTU, Gray
Highlights
Adjustable temperature settings
Expandable window mounting kit
Full function remote control

When it comes to keeping your space cool, the Perfect Aire window AC unit really delivers .

With adjustable temperature settings ranging from 62°F to 86°F, it can efficiently chill areas up to 450 sq. ft .

The expandable window mounting kit makes installation a breeze for horizontal sliding windows, though those instructions could use a little clarity .

We love the full function remote control with Follow Me technology, ensuring the whole room stays comfortable .

While it’s a hefty 72 pounds, a little help makes setup easier .

Overall, this is a solid choice for those hot summer days!

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Price history for PerfectAire 10000 on Amazon

Frigidaire Window Air Conditioner Ac Unit for Horizontal Sliding Window

Frigidaire FHWC054TE1 Window Air Conditioner, 5000 BTU Electronic Controls
Highlights
Multi-speed fan options
Quiet operation
Easy power restoration

We’ve got a treat for you with the Frigidaire FHWC054TE1, a top contender for horizontal sliding windows .

With a multi-speed fan offering three distinct speeds, you can easily customize your cooling experience for ultimate comfort .

We appreciate its whisper-quiet operation at just 52 dB, ensuring a peaceful environment even on the hottest days .

Installation can be a bit fussy, and the provided hardware is limited, but once set up, this unit shines in efficiency for rooms up to 150 square feet .

With over 17,000 ratings and a solid 4.4 stars, it’s a go-to choice for folks seeking reliable cooling!

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Price history for Frigidaire Window Air Conditioner on Amazon

Midea U-Shaped Air Conditioner

Midea 8,000 BTU U-Shaped Smart Inverter Air Conditioner – Cools up to 350 Sq. Ft., Ultra Quiet with Open Window Flexibility, Compatible with Alexa, 35% Energy Savings, Remote Control (Renewed)
Highlights
Ultra quiet operation
Energy efficient design
Smart app control

Introducing the Midea U Smart Inverter AC !

This U-shaped marvel not only operates at a whisper-quiet 32 dBA, making it nine times quieter than traditional units, but it also boasts remarkable energy efficiency with over 35% savings !

We love how it integrates with smart home technology, allowing control via the MSmartHome app or simple voice commands through Alexa or Google Assistant .

The flexibility to open your window while keeping the unit securely in place is a game changer .

Just a heads up: it’s a bit on the heavier side and installation can be tricky, but the benefits truly outshine these drawbacks.

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Price history for Midea U-Shaped Air Conditioner on Amazon

Ginost Portable AC

Portable Air Conditioners, 10000 BTU Portable AC for Room up to 450 Sq. Ft., 3-in-1 AC Unit, Dehumidifier & Fan with Digital Display, Remote Control, Window Installation Kit, 24H Timer, Sleep Mode
Highlights
Powerful 10,000 BTU cooling
3-in-1 multifunctional design
Easy to install and move

When it comes to cooling off those sweltering days, the GINOST KY-10K/07G unit is a game changer for horizontal sliding windows .

With a robust 10,000 BTU cooling capacity, it efficiently chills spaces up to 450 sq. ft., making it perfect for bedrooms, living rooms, or garages .

We love its 3-in-1 functionality—cooling, fan, and dehumidifier—all packed into one portable unit !

Installation is a breeze, thanks to the included window kit and easy-to-move design, but be aware that it might be a bit noisy on high .

Overall, this powerful AC is a solid choice to keep you comfortable all summer long.

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Price history for Ginost Portable AC on Amazon

DOMANKI Ac Unit for Horizontal Sliding Window

10000 BTU Portable Air Conditioners Cools up to 450 Sq. Ft 3-in-1 Poratble Ac Units for Room with Dehumidifier Fan Sleep Mode 24h Timer Remote Control and Window Installation Kit Included
Highlights
Effective cooling performance
Quiet operation at night
Easy to move around

When it comes to beating the heat, DOMANKI's portable AC unit truly shines .

With a powerful 10,000 BTU cooling capacity, it can chill rooms up to 450 sq. ft. in no time !

We love that it combines cooling, fan, and dehumidifying functions all in one sleek package .

The remote control (with a handy 25 ft range) lets us adjust the settings without ever leaving our cozy spot .

Plus, it operates quietly at about 51 dB, perfect for peaceful nights .

Just keep in mind, while it’s easy to move, it works best in smaller spaces .

Stay cool, everyone!

Be sure to also check out the best air humidifier filter for more options! Also, here is the price history so you know exactly when to buy!

Price history for DOMANKI on Amazon

ROVSUN 8000 BTU

ROVSUN 8000 BTU Air Conditioner Window Unit with Heat, 4-in-1 Window AC Unit Cooler, Heater, Dehumidifier & Fan with Timer, Remote Control & Installation Kit for Rooms up to 350 Sq. Ft, 115V/60Hz
Highlights
Quick cooling & heating
Easy to operate
Energy saving

When it comes to finding the best AC unit for horizontal sliding windows, the ROVSUN G46000626 is a strong contender .

With 8,000 BTU cooling and 4,000 BTU heating capabilities, it swiftly tackles spaces up to 350 square feet, making it perfect for cozy rooms .

We appreciate how straightforward it is to operate; from the LED display to the remote control, adjusting the settings is a breeze .

Plus, it's engineered for energy efficiency, so your wallet will thank you !

Though it may start a bit noisily, the gentle hum at 52 dB is manageable for most .

If you're seeking dependable comfort, this unit delivers.

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Price history for ROVSUN 8000 BTU on Amazon

Midea 12,000 BTU Air Conditioner

Midea 12,000 BTU U Shaped Smart Inverter Window Air Conditioner, Cools up to 550 Sq. Ft.,Ultra Quiet with Open Window Flexibility, Works with Alexa/Google Assistant, 35% Energy Savings, Remote Control
Highlights
Ultra quiet operation
Energy efficient design
Smart control features

We’re excited to share our thoughts on the Midea U Smart Inverter AC, a standout choice for anyone with a horizontal sliding window .

This unit boasts an ultra-quiet operation, achieved through its clever U-shape design that effectively blocks outdoor noise—imagine enjoying your peace and quiet with sound levels as low as 32 dBA !

Not only is it energy-efficient, saving over 35% compared to traditional units, but it’s also smart !

Control it anywhere via the SmartHome app or handy voice commands using Alexa or Google Assistant .

Though installation might take a bit of time, the payoff of cool, fresh air with minimal disruption is absolutely worth it!

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Price history for Midea 12,000 BTU Air Conditioner on Amazon

LG Through the Wall AC Ac Unit for Horizontal Sliding Window

LG 7,800 BTU Through the Wall Air Conditioner, 115V, AC Wall Unit for Rooms up to 330 Sq. Ft., Perfect for Bedroom or Office, Wall Mounted AC Unit with Remote and 3 Cool & Fan Speeds, White
Highlights
Energy efficient refrigerant
Quiet operation
Easy to install

When it comes to finding the best AC unit for horizontal sliding windows, we think the LG LT0816CER is a solid choice .

This 8,000 BTU powerhouse is designed for through-the-wall installation, making it a perfect fit for those unique window setups .

With an impressive EER of 10.7, it utilizes an energy-efficient R-32 refrigerant, ensuring those summer days won’t break the bank .

Featuring three cooling speeds and a turbo fan, it handles up to 330 square feet while Whisper Quiet tech means it operates at just 56 dB .

Plus, the remote control adds ease to your comfort .

Just be prepared for some installation quirks!

Be sure to also check out the best air humidifier filters for more options! Also, here is the price history so you know exactly when to buy!

Price history for LG Through the Wall AC on Amazon

ROVSUN 6000 BTU Window AC

ROVSUN Smart 6000 BTU Window Air Conditioner with WiFi, Energy Saving Window AC Unit with Remote & App Control & Timer Function & Easy Install Kit, for Rooms up to 250 Square Feet, 115V/60Hz, White
Highlights
Fast cooling
Easy operation
Energy saving

When searching for the best AC unit for a horizontal sliding window, we found that the ROVSUN 6,000 BTU window-mounted air conditioner delivers impressive results for compact spaces up to 250 square feet .

It excels at fast cooling, transforming your room into a refreshing oasis in no time .

Operating it is a breeze, thanks to its intuitive LED digital display and remote control—plus, you can even use a phone app to adjust settings like Eco Mode and Sleep Mode .

While it may require some assembly, the straightforward instructions make it a quick task .

Just a heads up: it's a little noisy, but its energy-saving features and gentle cooling will keep your home comfortable.

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Price history for ROVSUN 6000 BTU Window AC on Amazon

BLACK+DECKER

BLACK+DECKER Portable Air Conditioner, 9,000 BTU ASHRAE 128 (5,300 BTU DOE) for Rooms up to 400 Sq. Ft., Portable AC with Follow Me Remote Control and Window Kit, BPACT08WT, White
Highlights
Effective cooling
Three-in-one functionality
Easy mobility

When it comes to cooling off during those sweltering summer months, the BLACK+DECKER Portable AC unit is one we can't help but recommend .

This compact, three-in-one powerhouse not only cools your space of up to 400 sq. ft. but also works efficiently as a dehumidifier and fan .

The Follow Me Remote adds a touch of magic, allowing for precise temperature control just where you need it .

While it’s easy to move around thanks to its caster wheels, be mindful of the noise level—it can get a bit loud .

Nevertheless, with an installation kit included, setting it up in your horizontal sliding window is a breeze !

Keeping cool has never been so simple!

Be sure to also check out the best air humidity monitor for more options! Also, here is the price history so you know exactly when to buy!

Price history for BLACK+DECKER on Amazon

Midea 10,000 BTU Ac Unit for Horizontal Sliding Window

Midea 10,000 BTU U Shaped Smart Inverter Window Air Conditioner, Cools up to 450 Sq. Ft.,Ultra Quiet with Open Window Flexibility, Works with Alexa/Google Assistant, 35% Energy Savings, Remote Control
Highlights
Ultra quiet operation
Great energy savings
Smart app control

When it comes to keeping our spaces cool and serene, we can’t help but rave about the Midea U Smart Inverter AC .

Its U-shaped design doesn’t just look sleek; it effectively blocks outside noise, making it 9 times quieter than traditional units, with operation as low as 32 dBA .

The cherry on top ?

We love the 35% energy savings it offers compared to competitors, earning it the ENERGY STAR Most Efficient Certification .

Controlling the AC is a breeze with smart app capabilities, letting us adjust settings from anywhere .

While installation can be a bit tricky given its bulk, the comfort it delivers makes it worth the effort.

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Price history for Midea 10,000 BTU on Amazon

Loviga Air Conditioner Kit

LOVIGA Portable Air Conditioner Window Kit, Window Vent Kit Seal Kit for Portable Air Conditioner Dryer, 10x40~64 Inch Length Adjustable 100% Sealing Waterproof Easy to Install
Highlights
Easy installation
Strong adhesive velcro
Excellent sealing effect

When it comes to keeping your space cool without the hassle, the LOVIGA Portable AC Window Seal Kit shines like a summer’s day! 🌞 This product features an adjustable universal size that fits most horizontal sliding windows, ensuring you won't be left uncomfortably warm .

Its drawstring design offers excellent sealing, blocking out outdoor heat, rain, and pesky bugs .

Installation ?

A breeze !

Simply follow the steps to secure it snugly in place without any drilling .

With its solid materials and sturdy Velcro, you can trust this kit for reliable performance .

Just remember, it’s designed for single-use, but oh, what a refreshing investment it is!

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Price history for Loviga Air Conditioner Kit on Amazon

Shinco Portable AC

Shinco 10,000 BTU Portable Air Conditioner, Portable AC Unit with Built-in Cool, Dehumidifier & Fan Modes for Room up to 300 sq.ft, RC, 24 Hour Timer, Window Kit
Highlights
Powerful cooling capacity
3-in-1 function
Easy installation

We’re excited to introduce the Shinco SPF1-10C Portable Air Conditioner !

With a cooling capacity of 10,000 BTU, it effortlessly cools spaces up to 300 sq.ft, making it perfect for those sweltering days .

Its 3-in-1 functionality lets you switch between cool, fan, and dry modes, adapting to your needs year-round .

Installation is a breeze—just seal your sliding window and connect the included exhaust hose .

While it can get a bit noisy, and you might face some issues with the exhaust hose, the convenience of its mobility and user-friendly remote more than makes up for it .

Stay cool and comfortable this summer!

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Price history for Shinco Portable AC on Amazon

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