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5 Best Vertical Window AC For Any Room | Reviews

A Vertical Window AC, designed for tall, narrow windows, offers an efficient cooling solution without sacrificing space. Ideal for small rooms or spaces where standard window ACs can’t fit, vertical units provide comfort with their space-saving design, making them a go-to choice for targeted cooling in compact living areas. 

Key Factors:

  • Cooling Capacity: This is  measured in British Thermal Units (BTU), is crucial for determining an AC’s ability to cool a given space. We’ve included units ranging from 5,000 to 12,000 BTU, ensuring options for small rooms to larger living spaces.
  • Coverage Area: It is typically measured in square feet, indicates the maximum size of a room that an AC can effectively cool. Our selection covers a range from 150 to 550 square feet, catering to different room sizes and layouts.
  • Noise Level: It is a significant factor for comfort, especially in bedrooms or study areas. We’ve assessed the decibel (dB) ratings of each unit, focusing on those that offer a balance between efficient cooling and quiet operation, to ensure your living environment remains both cool and serene.

Our review offers a concise “Buying Guide” on top Vertical Window ACs, focusing on fit, comfort, and lifestyle suitability.

Best Vertical Window AC List

Best Vertical Window ACCooling CapacityCoverage AreaSEERBuy Now
Frigidaire 115-v Vertical Window AC10,000 BTU450 sq. ft.10.4Check On Amazon
Frigidaire Vertical Window AC8,000 BTU350 sq. ft.13Check On Amazon
Koldfront Vertical Window AC10,000 BTU450 sq. ft.10.4Check On Amazon
PerfectAire Vertical Window AC10,000 BTU450 sq. ft.13Check On Amazon
Keystone Vertical Window AC8,000 BTU 350 sq. ft.10.8Check On Amazon

Best Vertical Window AC Reviews

1. Frigidaire 115-v Vertical Window AC

FRIGIDAIRE 115-v Vertical Window ACFrigidaire has been a leading brand when it comes to the manufacturing and the innovation in the sector of air conditioners. This air conditioner has revolutionised the way we see at window AC. These are not meant for standard installation and demands to be installed vertically.

They have a BTU rating of 10,000 and can regulate the temperature of a room size up to 450 square feet. This AC unit has a dehumidification feature of 3.4 pints per hour and runs on a 115V standard electrical unit. It is controlled through a remote system with additional features like a 24-hour on/off timer. On top of that, it has an EER of 10.4.

There are various additional features like 4-way air direction, sleep mode, energy saver mode and auto cool features. The unit comes with a removable and washable mesh filter with a check filter alert. The brand offers a full-parts warranty of 1 year.

Best Features:

  • Coverage Area: 450 sq. feet
  • Cooling Capacity: 10000 BTU
  • SEER: 10.4


  • Dehumidification of 3.4 pints per hour.
  • Several additional features.
  • Washable mesh filter.
  • 24-hour timer.


  • Some buyers noticed denting on receiving the product.

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2. Frigidaire Vertical Window AC

Frigidaire Vertical Window ACFrigidaire has again made its appearance in the list for the innovation and high-quality of the ACs. This unit has three fan speeds which offers cooling flexibility.

This AC offers optimum comfort all through the day with the better energy savings feature. With that, the sleep mode enables the AC unit to increase the temperature at regular temperature before turning it off. It also allows the user to set the timer and control the operation with a 24-hours timer with a 30-minute increment. Also, the temperature and the fan speed can be controlled with the remote control. It also allows us to maintain the preset temperature for the room.

It features a detachable, washable filter which prevents dust and particles from entering the room. Installation is made simple with the provided side panels. The brand offers 1-year warranty.

Best Features:

  • Coverage Area: 350 sq. feet
  • Cooling Capacity: 8000 BTU
  • SEER: 13


  • Multiple fan speeds.
  • Easy remote control.
  • Convenient maintenance.
  • Easy installation.


  • Some buyers had an issue with the cooling capacity.

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3. Koldfront Vertical Window AC

Koldfront Vertical Window ACKoldfront has come up with a 10,000 BTU air conditioning unit which enables the user to survive easily through the summer months. This compact unit can easily cool a place within the range of 450 square feet.

This is a casement air conditioning system which allows vertical installation. The USP of this AC system is the energy efficient features like the sleep mode, thermostat controls, and check filter alerts, among others. The sleep mode adjusts the temperature at regular intervals while the energy saver mode runs the fans for 2 minutes and stops for a duration of 10 minutes. Additionally, it comes with a digital display and 3 controllable fan speeds. The in-built dehumidifier takes care of the excess moisture in the room.

It is controlled by a remote system. The brand offers a 2-year warranty.

Best Features:

  • Coverage Area: 450 sq. feet
  • Cooling Capacity: 10000 BTU
  • SEER: 10.4


  • Casement air conditioning system.
  • Energy savings specifications.
  • Sleep mode.
  • In-built dehumidifier.


  • Users had an issue with the battery compartment.

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4. PerfectAire Vertical Window AC

PerfectAire Vertical Window ACThis is a 10,000 BTU air conditioner by Perfectaire and can effectively cool an area of 400 sq feet to 450 sq feet. It is manufactured with premium-quality materials, which makes sure of dependability and reliability.

With an EER of 9.5, this AC unit is loaded with high-end features. The quiet operation of this unit enables the user to sleep peacefully at night. It can be controlled by a remote. With 3 variable fan speeds, it can be operated conveniently by the user. Plus, the AC unit features several additional features like slide-out filter access, restart function, and energy saver mode with dry, sleep and auto modes.

This air conditioner has a dehumidifier which removes the excess moisture from the room. The brand offers 24/7 after-sales service and 1-year warranty.

Best Features:

  • Coverage Area: 450 sq. feet
  • Cooling Capacity: 10000 BTU
  • SEER: 13


  • High-end features.
  • Remote control.
  • Energy saver modes.
  • Variable fan speeds.


  • Users complained of the customer service after sales.

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5. Keystone Vertical Window AC

Keystone Vertical Window ACKeystone, a leader in the home comfort industry, offers the Keystone 8,000 BTU Slider Casement Window-Wall Air Conditioner, perfect for efficiently cooling spaces up to 350 sq. ft. without traditional double-hung windows. 

Designed for horizontal slider or casement windows, this air conditioner boasts customizable cooling with three modes, three fan speeds, and four-way directional control. Its dehumidifying feature removes 0.9 liters of moisture per hour, enhancing room comfort. 

The unit is user-friendly, featuring a slide-in/slide-out filter, maintenance indicator, and a removable chassis for straightforward installation. Energy-saving options like ‘Energy Saver’ and ‘Sleep’ mode provide efficient cooling without hefty electricity bills, making it a smart pick for budget-aware shoppers.


  • Coverage Area: Up to 350 sq. ft.
  • Cooling Capacity: 8000 BTUs
  • SEER: 10.8


  • Efficient cooling and dehumidification.
  • Versatile installation options.
  • Programmable timer and energy-saving modes.
  • Removable, washable filter.


  • Not Energy Star certified.

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Buying Guide For The Vertical Window AC

When shopping for the best vertical window air conditioner, it’s essential to consider several key factors that will ensure you select a unit that fits your needs and enhances your living space. Here’s a detailed guide on what to consider:

1. Cooling Capacity

Cooling capacity, expressed in British Thermal Units (BTUs), is crucial in determining how effectively an air conditioner cools a space. For optimal energy efficiency and cost-effectiveness, selecting a unit with the correct BTU rating is essential. Generally, an air conditioner requires about 20 BTUs per square foot of space. For instance, a 350 sq. ft. room would need a 7,000 BTU unit. However, this can vary with factors such as ceiling height, window size, and room orientation, which may necessitate adjustments to the standard calculation.

2. Coverage Area

The coverage area of an air conditioner is a key aspect to consider, as it indicates the maximum area the unit can efficiently cool. It’s vital to choose a unit whose coverage matches the room’s size to maintain comfortable temperatures without overburdening the system. Product specifications often list the coverage area in square feet; ensure this matches or slightly exceeds the area of the room where the AC will be installed. Opting for a unit with a slightly larger coverage area than needed can be beneficial, especially in rooms that receive a lot of sunlight or have high ceilings.

3. Noise Level

The noise level of an air conditioner is an important consideration, especially in quiet spaces such as bedrooms. Noise is measured in decibels (dB), and air conditioners vary widely in the noise they generate. Models with noise levels below 50 dB are typically suitable for residential use. Features like insulated compressor compartments or advanced fan technology can help minimize noise. Whenever possible, check reviews or experience the unit firsthand to evaluate its sound level before purchasing.

4. Energy Efficiency

Energy efficiency, indicated by the Energy Efficiency Ratio (EER) or Seasonal Energy Efficiency Ratio (SEER), is critical for reducing both environmental impact and electricity costs. Look for air conditioners with an EER of at least 10 or a SEER that meets or exceeds current standards. Energy Star-certified models are recommended, as they are at least 10% more efficient than the minimum federal standard. Additional features such as programmable timers, sleep modes, and digital thermostats also contribute to overall energy savings.

5. Window Compatibility

Not all vertical window air conditioners are compatible with every window type or size, making it essential to ensure that the unit fits well to avoid installation problems and maintain efficient operation. Measure the dimensions of your window and compare these with the air conditioner’s specified fitting range. Consider the window type (e.g., sliding, casement) and check if the unit includes an installation kit to help securely fit the AC into the window.

6. Type of Controls

The type of controls on an air conditioner affects usability and functionality. Modern units offer a range of control options from basic mechanical dials to advanced digital interfaces and smart controls that integrate with smartphone apps. For ease of use, choose models with digital controls that allow precise temperature adjustments and feature clear LED displays. Consider units with remote controls or those that offer Wi-Fi connectivity for convenient operation from your smartphone, enabling you to adjust settings remotely or set schedules for better energy management.

7. Voltage

Voltage requirements are crucial for ensuring that an air conditioner is compatible with your home’s electrical system. Most residential air conditioners run on standard 115-volt circuits, but larger units might require 230 volts. Check the AC’s voltage requirements against your home’s electrical capacity, which can be verified by a professional if necessary. This is particularly important for avoiding electrical issues and ensuring safe operation.

8. Refrigerant

The type of refrigerant used in an air conditioner impacts both environmental sustainability and unit efficiency. Opt for models using newer, eco-friendly refrigerants like R-32 or R-410A, which have a lower global warming potential than older types such as R-22 (Freon). Using sustainable refrigerants supports global environmental efforts and may enhance the unit’s performance and efficiency.

9. Installation

Proper installation is crucial for an air conditioner’s efficiency, safety, and effective operation. Ensure the unit is compatible with the type of window you have and comes with a complete installation kit to prevent air leaks and ensure a secure fit. Models that provide comprehensive installation instructions or video guides are preferable. If the installation process is complex or the unit is heavy, consider hiring a professional, particularly for models that require a higher voltage, to ensure safe and correct installation.

Vertical Window AC FAQs

1. Does the vertical window AC need any angle for installation?

Ans: Yes, you need to install the vertical AC unit at a tilted angle so that the water can run down easily when the Ac is running. As the drainage system is already installed in the machine, the tilted angle will accelerate the process of getting rid of water.

2. At which place in the room the vertical AC can’t be installed?

Ans: You should avoid installing vertical AC in places where the heat is direct to the unit. So you should avoid places which come in direct contact with the sunlight.

3. At what height the vertical window AC can be placed?

Ans: When placing the window AC vertically, it should be installed at a height of 3 to 4 feet above the ground.

4. Does my air conditioner use a lot of electricity?

Ans: The 1 ton air conditioner uses near about 0.5 to 1 unit of electricity in each hour.


With this guide at your disposal, choosing the best vertical window air conditioners will be like a walk in the park. We have listed all the criteria you need to know to buy vertical window air conditioners. Therefore, you must apply these considerations when buying air conditioners. You can write to us in the comments section below if you still have doubts.

  • If you are here for the recommendations, we have listed the top three favourites from the list. The first recommendation for the best overall product is FRIGIDAIRE 115-v Vertical Window AC. It features a dehumidifier of 3.4 pints/hour and several additional features.
  • The second recommendation if you are on a budget is the Frigidaire Vertical Window AC. It has several fan speeds with easy remote controls.
  • The third and final recommendation from the list is Koldfront Vertical Window AC. This is a casement air conditioning system with energy-saving specifications.

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