Window air conditioners are a great way of keeping both small and large rooms cool without increasing the numbers on your electric bill.

But even though window ACs provide good air circulation and energy efficiency, there are several models that can wake up your neighbors with their considerably high noise levels.

However, after a few hours of research, and comparing several window air conditioners alongside, we’ve narrowed down on 8 options to choose from.

This list also includes the quietest window air conditioner and an ultra-quiet air conditioner that doesn’t do anything more than whisper during operation.

Quietest Window Air Conditioner: Our Picks

1. Quietest Air Conditioner with Inverter

The Midea U air conditioner can be ordered in a choice of several different sizes starting from 8,000 BTU to a 12,000 BTU model. It is engineered to provide an impressive 35 percent energy efficiency compared to other window air coolers and is Energy Star rated for 2020.

In terms of noise, the Midea U air conditioner operates at a low 42 dBA, which is approximately nine times quieter than other air conditioners in its segment.

Unlike traditional air conditioners, the Midea U allows you to open and close your window even with the unit installed, so you get the best of both worlds—cool air and fresh air when you desire.

Speaking of which, the Midea U air conditioner is easy to install with the included support bracket, and is a perfect fit for single-hung or double-hung windows that measure between 22 inches and 36 inches.

Adding to its long list of features is the Midea U’s smart control feature that allows you to control the air conditioner via WiFi and the Midea app, available on both iOS and Android platforms. This air conditioner is backed by a one-year warranty against any manufacturer defects.

What We Like:

• 3 size options
• Low 42 dBA noise level
• The window can be opened or closed after installation
• Can be installed on single-hung or double-hung windows
• App control
• 1-year warranty

What We Don’t Like:

• Installation instructions are poorly written

2. Quiet Air Conditioner for 250 Square Feet

The GE Serenity slots in at the #2 position on this list of quiet window air conditioners for several great reasons, most notably its extremely low noise 43 dBA performance. It offers 6000 BTU air cooling power, making it an ideal fit for spaces that measure up to 250 square feet.

Adding to this, the Serenity quietest window AC by GE boasts energy-efficient cooling and offers three cooling and fan speeds to select from. Further, it is easy to install on its fixed chassis on double-hung windows with the included EZ mount installation kit.

The sleep mode feature of the GE Serenity air conditioner when engaged allows you to gradually increase the temperatures through the course of the night for comfortable sleep. This air conditioner from GE is fitted with a one-touch lift-out filter that is easy to remove and clean.

The package also includes a remote to make the necessary adjustments from anywhere in your room.

What We Like:

• 43 dBA noise level
• 6000 BTU/cools up to 250 square feet
• Includes EZ mount installation kit/remote
• Easy to remove and clean filter
• 24-hour on/off timer

What We Don’t Like:

• Side panel design needs improvement
• Setup can be a bit challenging

3. Quietest Window AC for Large Spaces

If you have a large space you’d like to cool—one that measures up to 1500 square feet, the Koldfront window ac is perhaps a good option for you.

Apart from cooling up to 1500 square feet, the Koldfront window ac can also heat up areas up to 700 square feet, so you get cooling and heating from a single appliance.

The Koldfront window ac also serves as a dehumidifier and can remove an impressive 137 pints of moisture per day. It boasts 16,000 BTU heating power and an astounding 25,000 BTU cooling power and fits windows that measure between 31″ and 42″ wide, and a minimum of 19.5” in height.

It is fitted with four-way air direction louvers, and offers four operation modes, making it easy to get the cooling or heating you desire.

With regards to energy efficiency, the Koldfront window AC doesn’t disappoint with its integrated sleep mode, which when activated adjusts the temperature of the unit automatically and periodically according to the room temperature.

This air conditioner by Koldfront comes with a convenient remote, so you can access its many functions wirelessly, and from anywhere in your space.

What We Like:

• Cools spaces up to 1,500 square feet and heats spaces up to 700 square feet
• Removes 137 pints of moisture per day
• Remote and sleep mode
• Fits windows between 31″ and 42″ wide.19.5 inches in height (min)
• 2-year manufacturer warranty

What We Don’t Like:

• Can’t be installed in a wall sleeve

4. Quietest 10,000 BTU Window Air Conditioner

The Frigidaire window AC offers 10,000 BTU air circulation power, making it an ideal choice for spaces that measure up to 450 sq. ft. It can also remove moisture from the air at the rate of 3 pints per hour, and can be plugged into a standard 115-volt electrical outlet.

This window ac from Frigidaire showcases a compact footprint and runs at a low noise level during operation. It features a low power start for great energy efficiency and restarts automatically after a power outage.

The Frigidaire is one of the few quiet window air conditioners that offers three different speeds to choose from, so you get great cooling versatility.

It comes with a removable filter that’s also easy to clean and reinstall. The Frigidaire window ac features an onsite timer to turn the unit on and off automatically according to your schedule.

This Frigidaire window AC model can be operated with the included remote and is backed by a one-year limited warranty against any manufacturer defects.

What We Like:

• 10,000 BTU air circulation power
• Low noise level
• Ideal for rooms 450 sq. ft. in size
• Remote operation
• Dehumidifies at 3 pints per hour
• Restarts automatically after a power outage
• 1-year limited warranty

What We Don’t Like:

• The quality of Styrofoam insulation could be improved

5. Quite Window Air Conditioner with 14,000 BTU Cooling Capacity

The Haier window ac is really quiet during use and can be ordered in a wide range of sizes including 8,000 BTU and 10,000 BTU, and in mechanical, electronic, or WiFi styles.

It is a great fit for rooms as large as 700 sq. ft., and offers three cooling and three fan speed options for energy-efficient air circulation.

The Haier air conditioner is Energy Star rated, and can be installed on double-hung windows with the included EZ mount kit.

It features a power interruption restart that starts the unit automatically after a power failure, and a 24-hour on/off timer to power on or power off the AC at a preconfigured time.

Adding to its rich set of features is an easy-to-remove and clean filter, and remote to access the functions of the air conditioner.

The Haier window AC can also be paired with the SmartHQ app to monitor, schedule, and control the appliance.

What We Like:

• App and remote
• 24-hour on/off timer
• Different sizes and styles available
• Auto restart after power failure
• Ideal cooling capacity for 700 sq. ft. rooms

What We Don’t Like:

• Lacks dehumidifying functionality

6. Quiet Air Conditioner with 8000 BTU Cooling Capacity

The TOSOT is probably one of the quietest window air conditioners in the market, thanks to its 42 decibels max noise output.

It is available in two different styles—chalet and tranquility, and three different sizes including 8,000 BTU and 10,000 BTU, and is fitted with a removable drain plug for further noise reduction.

This window AC by TOSOT is Energy Star rated, and can cool up to 350 sq. ft. size spaces. Additionally, it features slanted air louvers that can be adjusted to blow cool air as far as 20-feet away.

It is easy to install within 15 minutes to 20 minutes and comes with foam side panels, a 6-feet power cord, a remote controller, and simple instructions.

What We Like:

• 42 decibels max noise output
• Two different styles—chalet and tranquility, and 3 sizes available
• Energy Star rated
• Cools up to 350 sq. ft. size spaces
• Slanted air louvers
• Includes remote control and mounting hardware

What We Don’t Like:

• Lacks WiFi connectivity

7. Quite Window Air Conditioner for Medium Size Spaces

The LG window AC offers 53 dB quiet noise operation and delivers superior cooling performance in rooms as large as 550 square feet. It is Energy Star certified, so you get great savings on your energy bill.

Furthermore, the LG window AC can be adjusted between three cooling and fan speeds, and also comes with an auto cool feature for customized cooling in your room.

This quiet window AC by LG features digital control and comes with a remote for wire-free operation. In the event of a power outage, the LG air conditioner restarts the unit automatically, so you don’t have to!

This LG window AC comes with everything you need to get started right out of the box including a mesh filter, installation kit, and instructions.

What We Like:

• 53 dB quiet noise operation
• Energy Star certified
• 3 cooling and fan speeds
• Digital and remote control
• Auto restart after a power outage
• 1-year manufacturer warranty

What We Don’t Like:

• 2 AAA batteries for remote not included

8. Quiet Portable Sill Window AC

The Soleus is basically a portable AC, windows AC, and mini-split AC, and boasts an ultra-quiet 41 dB operation, given that the compressor noise stays outside.

When installed, the Soleus AC gives you a clear view through your window and comes with three modes—auto mode, sleep mode, and dry mode.

It fits windows that are 24″ to 48″ wide, and at least 11″ in height, and comes with a washable and reusable filter for easy maintenance.

The Soleus AC features a 24-hour timer, and electronic controls, and remote operation. It restarts automatically after a power outage and can be ordered with an extended warranty.

What We Like:

• Quiet 41 dB operation as compressor noise is outside
• 3 modes
• Washable and reusable filter
• 24-hour timer
• Electronic controls and remote operation

What We Don’t Like:

• Requires manual draining

Quietest Window Air Conditioner FAQs

Who makes the quietest window air conditioner?

There are several companies that make quiet window air conditioners such as Frigidaire and Midea. But it’s worth mentioning that noise levels aren’t everything, because the last thing you want to buy is the quietest air conditioner with a slew of problems.

A silent AC typically emits 52 dB at its highest speed, but there are some models that can sing as low as 38 dB such as the Gree air conditioner.

The Gree window AC is available in several different sizes including 8,000 and 10, 000 BTU, and is probably the quietest window air conditioner you can buy, owing to its dedicated sleep mode.

The sleep mode when engaged via a dedicated button on the remote control intelligently regulates the temperature in your room at a low noise level.

Plus, the Gree window AC is fitted with an R32 refrigerant that provides faster cooling in an environmentally friendly way.

It offers three-in-one functionality, in that it can be used to cool, dehumidify, or as a regular fan in your room.

The Gree window is possibly one of the only quiet window air conditioners that come with I Feel technology, which is designed to accurately determine, and adjust the indoor temperature in your space.

The I Feel technology works when the remote control receives an I Feel command and sets the unit to the ambient temperature sent by the controller.

The Gree window AC comes with several other key features, some only seen in much higher priced models such as two operation modes to choose from—energy-saving and automatic.

It offers a great 73 pints per day dehumidification capacity and even comes with a cleaning reminder function, which as the name suggests alerts you when the filter needs cleaning.

Adding to its rich set of features is an integrated LED display and remote control. The Gree window air conditioner is easy to install without making any significant modifications to your existing window frame.

The Gree window AC comes with a 12-year worry-free warranty against any manufacturer defects.

What We Like:

• 3-in-1 functionality
• R32 refrigerant
• LED display and remote control
• 73 pints per day dehumidification capacity
• 2-year worry-free warranty
• Sleep mode for low noise operation
• 3 sizes available

What We Don’t Like:

• Doesn’t come with a screwdriver to complete the installation

How many decibels is a quiet air conditioner?

When shopping on the shopping trail for a quiet air conditioner, the first question that probably crops up in your mind is how many decibels is a quiet window AC?

The sound levels of window air conditioners are measured in decibels (dB), and the lower this number is, the quieter the air conditioners will be.

The decibels of the quietest air conditioners are generally between 50 dB and 60 dB, which comparatively sounds like rainfall, percolating coffee, running a sewing machine, or a normal conversation.

However, the quietest window air conditioner for you may not be the same for someone else, and here’s why!

Take the example of brewing coffee in the morning—does the noise bother or annoy you? If you’re used to the sound percolating coffee or rainfall, the noise will fade into the background, so you’ll probably not even notice it.

Even the quietest window air conditioners can start to become obnoxiously loud over a period of time, especially if they’re not maintained.

Things you can do to keep window air conditioners running quietly include dusting the fans and coils, tightening the panel screws, and checking the internal components for any loose parts.

The Della is a good example of a quiet window air conditioner, because it offers three fan speeds to choose from, and operates at an impressive 58 dB at its highest speed.

Apart from cooling your room, the Della quiet window air conditioner also removes 51 pints of moisture from your room per day, so you get both, a high quality 8.000 BTU AC and a dehumidifier in a single unit.

Adding to this, the Della AC is a joy to operate with its LED digital display, and remote control. This window-mounted air conditioner by Della can cool rooms that measure up to 350 sq. ft., and provides great energy efficiency.

What We Like:

• 3-in-1 AC
• 58 dB at its highest speed
• Removes 51 pints of moisture per day
• 5 sizes available
• LED digital display and remote control

What We Don’t Like:

• Limited to 1 style and color

Is there an ultra-quiet air conditioner?

In fact, there are many models, but the Haier Serenity wins the gold when it comes to buying an ultra-quiet window air conditioner. This 6,200 BTU window air cooling appliance is suitable for rooms up to 250 sq. ft. in size, and operates at just 43 dB.

1. The Haier Serenity air conditioner allows you to choose from three cooling and fan speeds and features a sleep mode, which increases the temperatures gradually overnight for a comfortable night’s sleep.

It is fitted with a fixed chassis and can be installed on double-hung windows with the included EZ mount kit.

What We Like:

• Great energy efficiency rating
• Operates at just 43 dB
• Suitable for rooms up to 250 sq. ft. in size
• 3 cooling and fan speeds
• Includes EX mount installation kit

What We Don’t Like:

• Only available in 1 size

2. Another quiet window AC unit is the EasyCool by Midea and is quieter than your household refrigerator. The Midea EasyCool AC is available in myriad different sizes including 12, 000 BTU, and offers three modes including an eco mode.

This 3-in-1 12,000 BTU air conditioning unit can cool, circulate air and dehumidify your space, and features a crisp and clear LED display.

It comes with all the mounting accessories required for the installation in your existing 23″ x 36″ x 14″ window frame. The Midea EasyCool AC unit can be controlled with the included compact remote and is backed by a one-year parts and labor warranty.

What We Like:

• 3-in-1 functionality
• Several sizes available
• LED display and remote
• Energy-efficient operation
• 1-year labor and parts warranty

What We Don’t Like:

• Can only be installed on aluminum-framed windows with modifications

3. The hOmelabs unit is a smart AC, as it can be paired with Wi-Fi with Alexa and Google Assistant. Pairing the AC with Alexa or Google Assistant is simply a matter of pressing the “Smart” button on the appliance.

It is CEC, DOE, and CSA certified, so you can expect great energy efficiency, and comes with both a cool mode and fan mode.

The hOmelabs AC runs fairly quietly between 57 dB and 60 dB and can be installed in less than 15 minutes without any professional help.

What We Like:

·   Can be paired with Wi-Fi with Alexa and Google Assistant

·   CEC, DOE, and CSA certified

·   Runs quietly between 57 dB and 60 dB

What We Don’t Like:

·        Quality of panels, not the best