Quietest Through The Wall Air Conditioner – Top 5 [2020]

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quietest through the wall air conditioner

Summer is right around the corner and with it comes the horrors of sleepless nights in the sweaty sheets. If you’re easily disturbed by steady humming you’ve probably thought the same as us: what’s the quietest through the wall air conditioner on the market? We decided to find out!

In addition to our picks you’ll find some insight on why you should choose a through the wall AC instead of other options and what factors you should take into consideration before buying. As the demand for air conditioners is on the rise, you’re not the only one pondering over these questions!

If you’re here to just find out a short answer to the question here’s a quick glance at our findings:

AC UnitPhotoDetailsCheck on Amazon
Star Air Kontrol AK-08HS115VStar Air Kontrol AK-08HS115V through the wall air conditionerNoise level: 51 dB
Cooling power: 8,000 BTU
Dehumidifying:
Energy Star:
Voltage: 115 V
See details
LG LT0816CERLG LT0816CER 8,000 BTU Wall Air ConditionerNoise level: 56/53 (on high/low)
Cooling power: 8,000 BTU
Dehumidifying:
Energy Star:
Voltage: 115 V
See details
Emerson Quiet KoolEmerson Quiet Kool EATH14RD2Noise level: Under 57 dB
Cooling power: 14,000 BTU
Dehumidifying:
Energy Star:
Voltage: 230 V
See details
Koldfront WTC8002WCOKoldfront WTC8002WCO thru-the-wall ACNoise level: Under 57 dB
Cooling power: 8,000 BTU
Dehumidifying:
Energy Star:
Voltage: 115 V
See details
Keystone KSTAT12-1CKeystone KSTAT12-1C air conditionerNoise level: 56 dB (on low)
Cooling power: 12,000 BTU
Dehumidifying:
Energy Star:
Voltage: 115 V
See details

Quietest Through The Wall Air Conditioners - Best Picks

Star Air Kontrol AK-08HS115V

Star Air Kontrol AK-08HS115V through the wall air conditioner
  • Cooling area: Up to 170 sq ft
  • Noise level: 51 dB
  • Cooling power: 8,000 BTU
  • Dehumidifying:
  • Fan: 3-speed
  • Timer:
  • Remote control:
  • Size: 20.3 x 14.5 x 24.2 in
  • Weight: 75 lbs
  • Energy Star:
  • Voltage: 115 V

Star Air Kontrol AK-08HS115V is the quietest through the wall air conditioner that we found in our research. With an operating noise level of just 51 dBA it’s a step above the rest of our picks.

However, it does lack some of the features that its competitors have, and it is best suited for smaller spaces (up to 170 square feet) with the cooling power of 8,000 BTUs. If your only criterion is the sound, it is your pick. Otherwise we would suggest you to keep scrolling.

LG LT0816CER

LG LT0816CER 8,000 BTU Wall Air Conditioner
  • Cooling area: Up to 330 sq ft
  • Noise level: 56/53 dB (high/low)
  • Cooling power: 8,000 BTU
  • Dehumidifying cap.: 2.1 pints / hour
  • Fan: 3-speed
  • Timer: Up to 24 hrs ✅
  • Remote control:
  • Size: 24 x 14.41 x 20.09 in
  • Weight: 65 lbs
  • Energy Star:
  • Voltage: 115 V

LG LT0816CER is the most silent air conditioner with dehumidifying capabilities on our list. In addition to all the premium features that it comes equipped with it’s also energy-effective: it’s one of the two AC units on our list with an Energy Star certificate. Similar to the Star Air Kontrol it’s also best suited for smaller rooms.

Emerson Quiet Kool

Emerson Quiet Kool EATH14RD2
  • Cooling area: Up to 700 sq ft
  • Noise level:
  • Cooling power: 14,000 BTU
  • Dehumidifying:
  • Fan: 3-speed
  • Timer: Up to 24 hrs ✅
  • Remote control:
  • Size: 20.3 x 24.2 x 14.5 in
  • Weight: 91.9 lbs
  • Energy Star:
  • Voltage: 230 V

The 14,000 BTU version of Emerson’s Quiet Kool series is a powerful beast, yet it still remains silent. The silent operating sound is not the only thing that makes it a wonderful pick for restless sleepers: Emerson has also included a button on the remote for turning off the display. If you’re easily distracted by even the smallest lights in your bedroom, this feature is a godsent.

If you’ve got a large master bedroom, look no further.

Koldfront WTC8002WCO

Koldfront WTC8002WCO thru-the-wall AC
  • Cooling area: Up to 300-350 sq ft
  • Noise level:
  • Cooling power: 8,000 BTU
  • Dehumidifying:
  • Temperature: 62° F - 86° F
  • Fan: 4-speed
  • Timer: Up to 24 hrs ✅
  • Remote control:
  • Size: 14.5 x 24.2 x 20.3 in
  • Weight: 64.9 lbs
  • Energy Star:
  • Voltage: 115 V

If you’re looking for versatility, this Koldfront 8,000 BTU AC unit might be your pick with its 4 different fan speed options, 24 hr timer and energy saving & dehumidifying functions.

Best suited for areas up to 300-350 square feet it is not ideal for larger rooms, but there are 10,000 and 12,000 BTU models of the same device available.

Keystone KSTAT12-1C

Keystone KSTAT12-1C air conditioner
  • Cooling area: Up to 550 sq ft
  • Noise level: 56 dB (on low)
  • Cooling power: 12,000 BTU
  • Dehumidifying cap.: 2.5 pints / hour
  • Fan: 3-speed
  • Timer: Up to 24 hrs ✅
  • Remote control:
  • Size: 24.2 x 20.3 x 14.5 in
  • Weight: 75.9 lbs
  • Energy Star:
  • Voltage: 115 V

Keystone KSTAT12-1C is suited for cooling areas up to 550 square feet in size. The quiet operation sound (56 dB on low) is just one of the highlights of this Energy Star rated unit: it also has the highest dehumidifying capacity of our picks. Combine all this with the usual goods (3-speed fan, 24 hr timer, a temperature sensing LCD remote) and you’ve got yourself an excellent quiet through the wall air conditioner.

Choosing The Right AC Unit

If you’re totally new, here are some factors that you need to take into account when choosing from the wide array of options.

Room Size & Cooling Power

Cooling capacity is measured in BTUs, which stands for British Thermal Units. There are a lot of factors that make it impossible to say for certain that how much is needed – insulation, humidity, how many heating electronic devices are in the room, are the windows exposed to direct sunlight etc. 

As a rough generalization, however, we would advise as follows:

  • 8,000 BTU up to 340 sq ft
  • 10,000 BTU up to 450 sq ft
  • 12,000 BTU up to 550 sq ft
  • 14,000 BTU up to 700 sq ft

Operation Volume

Since we are looking for the quietest through the wall air conditioners, loudness of the unit is quite obviously a major factor. We’ve only included units that produce less than 60 decibels of noise according to the manufacturer – the lower the better.

Dehumidifying Capacity

Do you also need dehumidifying? Some AC units also operate as dehumidifiers. Dehumidifying capacity is measured in how many pints of excessive moisture the device can remove per day or hour. 

Heating

Some units can also be used as heat pumps. Are you only in need of cooling or is this a feature that you could use?

Room Height

Taller rooms require more cooling power.

Advantages Of Through-The-Wall Air Conditioners

Deciding between portable, window and through the wall air conditioners requires some thinking.

Installation

First, let’s get the “for dummies” part out of the way: portable air conditioners are the easiest ones to install since you only need to place (not mount) it close to a window and install the hose. Window AC units are almost as easy, but most people don’t realize that they are not designed for any particular window, making it more complicated since you need to make sure that the unit fits your window.

With through the wall AC units you can just make the whole properly sized (or have it done if you’re like most of us). Yes, it’s a project of its own but the result is also permanent. Window units are usually uninstalled and stored elsewhere for cold seasons. Not to mention that having one on your window isn’t the most beautiful of sights, and it could potentially be blocking off a sight that you enjoy.

Wall air conditioners can usually be installed anywhere on your wall, so it will not be blocking off anything or take any space on your floor, like a portable AC unit does.

Cost-Effectiveness

Even though window-mounted air conditioners are cheaper than through the wall alternatives, they tend to waste more energy, resulting in higher running costs. A through the wall AC will end up saving you more money in the long run.

Last update on 2020-02-25 / Affiliate links / Images from Amazon Product Advertising API