Top 8 Quietest Air Conditioners – (Reviews & Guide 2021)

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Investing in the quietest air conditioner will not only keep you cool during summer but also make your life much easier because you don’t have to worry about distractive noise when you sleep.

The most important thing to consider when choosing an air conditioner is the decibel rating. It’s a value that determines how quiet or loud a unit will be in your room. The higher the value, the noisier the unit. The lower the value, the quieter the unit.

If you’re not sure how to go about choosing a quiet air conditioner, here is a review of some of the best air conditioners that will keep your room comfortable as well as help you maximize your peace and quiet around the house.

We’ll also discuss factors to prioritize (besides noise rating) when shopping for a low-noise air conditioner.

The 8 Quietest Air Conditioners Comparison Table

Why should you Buy a Quiet Air Conditioner?

why choose Bosch quietest air conditioner

Let’s begin with why the noise rating is a big deal when shopping for an air conditioner. Why should noise be among your top considerations?

Well, HVAC noise affects people in different ways. First off, it becomes difficult to communicate when the air conditioner is too loud. If your AC is louder than normal speech, you may need to shout for the next person to hear you. It creates a situation where everyone in the home could be shouting to be heard. Not ideal, right?

Moreover, when you need to raise your voice to communicate, your conversation quality is diminished. Talking becomes more of a chore, and silence starts looking like a better idea. You don’t want to get to that point. It’s also likely that the shouting match will result in even more noise in the home — a terrible thought.

The worst part is the need to be the least of worries when dealing with a noisy air conditioning system. Excessive AC noise can go as far as to cause sleeping problems and may even result in hearing loss!

  • Sleeping Issues

There have been multiple studies on the effects of air conditioner noise on sleep. One of these studies published on the National Center for Biotechnology Information website found that sleeping with the AC increases the time it takes to fall asleep by up to 8 minutes and reduces the total time slept by another 20 or so minutes.

It means that you could lose 30 minutes’ worth of sleep just because of that noisy AC. The louder the air conditioner, the more sleep time you stand to lose.

Some studies also show that AC noise can wake you up during the night or even prevent you from entering REM sleep.

  • Hearing Loss

The claims that AC noise can cause or contribute to hearing loss might seem exaggerated. But, they’re indeed true.

Consider that a typical conversation generates about 60 decibels (more on decibels shortly). It means that the human ear is most comfortable at around that mark. Anything above 60 decibels would be noisier to the ear, which explains why many AC manufacturers aim under 55 decibels.

Yet, a noisy air conditioner can produce as much as 90 decibels or higher. This is the sound level of the subway, a lawnmower, or loud shouting.

It’s been shown that exposure to such high noise levels can damage. The longer you’re exposed, the worse the effects. If you were to be exposed to this high sound level for several months, it could permanently damage your eardrum, resulting in significant hearing loss.

  • Other Harmful Effects of Loud ACs

Over a prolonged period, a loud AC can also cause increased blood pressure, stomach and intestinal issues, elevated heart rate, cardiovascular complications, brain chemistry changes, difficulty breathing, increased stress levels, and a negative impact on learning abilities.

Why is your Air Conditioner So Loud?

Why your air conditioner is too loud

The sound you can hear from an air conditioner, even a new, low-noise model, comes mostly from the condenser. In window ACs, through the wall models, and central air systems, the condenser forms part of the whole unit and sits side by side to the air handler. In mini-splits, though, the condenser is located in the outdoor compartment.

The typical air-cooled condenser unit comprises the compressor, fan, coil, and expansion valve. The compressor makes the most noise out of all these components as it circulates the refrigerant. You can’t do anything about this because the compressor is designed to be inaccessible. You can only replace it.

Most AC systems employ a vibration bad (or multiple such pads) to minimize the compressor noise and other noises from the air conditioner, but the pads can wear out too. These pads are located inside the unit and can only be accessed by a professional technician.

Finally, your AC’s noise can also result from wearing off of the compressor motor or valve, or due to blockage inside the AC. The blockage might be caused by leaves or dirt. These elements may prevent the fan from rotating smoothly or force the blades to work harder, resulting in increased noise.

Noise-Free AC Operation Starts with Picking a Quiet AC

From the above discussion, you can tell that the path to noise-free AC operation starts with picking a quiet air conditioner. So, what’s a “quiet” AC?

Understanding Noise Ratings – the Decibel (dB)

decibel char

The first thing you need to understand here is how AC sounds are rated. The sound produced by air conditioners is measured in decibels (dB).

The decibel is 1/10 of a bel. The human hearing range is between one and two bels. As such, the lower the decibel value, the better.

The decibel is a measure or expression of sound pressure (in exact measurements) that reaches our eardrums. It’s determined by comparing the pressure of sound produced against a standard (predetermined) pressure level. So, no, it’s not compared against absolute zero.

It’s worth mentioning that we all hear differently. What one person considers loud might be barely audible to the next person.

Sometimes it helps to understand the noise ratings of the noise source around us to gauge the noisiness of air conditioners. Stun grenades and space shuttle engines produce about 170 to 200 decibels, thunder and jackhammers produce 120 to 130 decibels, vacuum cleaners have 80 to 90 decibels, and dishwashers/heated conversations generate about 60-70 decibels.

On the quieter end, rain produces about 50-55 decibels, whispers and quiet bedrooms are at 30-40 decibels, and total quietness can range from 0-20 decibels.

What is “Noisy” and What’s “Quiet?”

Standard air conditioners produce the same amount of sound as rain and the home/office, i.e., around 50-55 decibels, while noisy ones typically generate 60-70 decibels. HVAC experts concur that anything below 60 dB is within acceptable sound range. Sounds above 60 dB are classed as noise.

However, some air conditioners are extremely quiet. A few models, especially portable ACs, produce fewer than 25 decibels in Sleep Mode. This, as you may deduce from the above comparison, is very quiet. These ACs can be used in the bedroom, and they wouldn’t negatively affect your sleep.

4 Key Factors to Consider when Shopping for the Quietest Air Conditioner

Still, on new ACs, several factors can affect the noisiness or quietness of an air conditioner. These are;

Type of AC – Which Types of ACs are the Quietest?

Generally, split ACs (ductless models) are the quietest, followed by portable models, then central ACs, and finally window/wall ACs in that order.

  • Ductless mini-splits: Ductless mini splits are designed such that the condenser unit installs outdoors while the air handlers are installed insider the house. This design is the biggest reason these units are so quiet. Since the loudest part of ACs, the condenser unit, is outside the home, noise is significantly reduced. Many mini split indoor air handlers are rated between 35-50 decibels.
  • Portable air conditioners: Portable air conditioners are self-contained AC systems that vent outside the home. They sit on the floor and typically come with wheels for mobility. Many portable ACs are rated between 45 and 55 decibels.
  • Central air conditioners: Central ACs are whole-home air conditioning systems. What makes them relatively quiet is that the compressor, evaporator, and condenser are packaged in one unit, tucked away in the attic, or an appliance near the home. The only sound you’re likely to hear is the blowing action as the fan system pushes air through the home’s ductwork.
  • Window/wall ACs: Window ACs sit on the window while wall ACs sit and form part of the wall. For wall ACs, you need to remove part of the wall to install the appliance. Window ACs don’t require a hole in the wall. What makes these two ACs the least quiet air conditioning options is that the condenser and the air handlers are located in the same unit. These two AC models also produce a lot of vibration owing to the installation type.

AC Noise Level – what’s the Right Decibel Level?

All air conditioners display the noise rating. You can also ask the seller and even contact the manufacturer for more information on the noise rating. It’s your job to pick a unit with a low noise rating.

As discussed above, if you’re shopping for a ductless mini, then you should shop for noise ratings in the 35-45 decibel range. Anything in the lower 40s would be great. For portable ACs, 45-55 decibels is considered an acceptable range. Central air systems and window/wall systems tend to be louder. In both cases, try to shop in the 50-60 decibel range.

Something else to keep in mind is that for split ACs, the outdoor and indoor units have different noise ratings. You should pick the lowest possible noise levels in both cases. For outdoor units, a 50-55 decibel level is acceptable. As for the indoor model, try to shop in the 35-45 dB range.

AC Size – How Many BTUs do you need?

The size of the AC is another crucial factor. Higher-capacity AC systems typically make more “noise.” It’s partly why whole-home central ACs and split systems are less quiet than smaller, portable models.

It makes sizing very important. You need to pick the right size AC for your home. Oversizing is the most common cause of AC noise, where the air conditioner is still new. To get more cool air or heat in the room, you might be tempted to buy an AC rated higher than that space.

For instance, you could choose to buy 12,000 BTU AC for 250 Sq. Ft. room, knowing too well that 12,000 BTU ACs are ideal for larger spaces in the 450-550 Sq. Ft. range.

That larger AC will deliver more coolness/warmth, yes, but at a cost. First off, you’ll experience more humidity and a higher energy bill. Additionally, you’ll experience more noise.

Under-sizing is just as bad. Picking a 5,000 BTU AC (recommended for 100-150 Sq. Ft. rooms) for your 600 square foot bedroom, perhaps to save on costs, will result in the AC working harder and longer to attain the desired indoor temperatures.

Working harder means more compressor, blower, and motor noise. Working longer means you’re exposed to the increased noise for a more extended period.

Technology (Old vs. New AC Models)

Finally, you also want to consider the technology used in the air conditioner. Typically, newer technologies are quieter than older ones.

Many manufacturers are taking advantage of insulation technologies around the compressor to muzzle the humming noise while ensuring safe operation. A few manufacturers are also now using innovative mounting materials to reduce the unit’s impact and noise as it moves under the force of the condenser and compressor.

A few AC models use new fan technologies that allow for an improved fan design to limit the noise generated when the fan blades are rotating. New venting methods also help to muffle the sound of air as it exits the louvers.

Finally, variable speed blowers that self-adjust to deliver optimal indoor comfort are also quieter. Alternatively, consider AC models with multiple speed settings. Some have a “Silent,” “Sleep,” or “Night” setting at which the blower moves a little slower, thus lesser noise.

3 Post-Purchase Considerations

After you’ve identified and purchased a low-noise air conditioner, there are a couple more steps you can take to ensure that the unit is as quiet as possible. These are;

Proper Location (and Venting)

The installation location of the AC significantly determines how much noise you get in your home. For one, you want to increase the distance between the air conditioner and you (home occupants). You want to have it as far away as possible from the places you spend the most time – without compromising indoor climate.

Some studies show that every time the distance between you and the AC doubles, the amount of “noise” that reaches you decreases by 6 decibels.

It’s the reason most experts recommend having the AC on the opposite side of the house from the bedroom or study. It could reduce the amount of sound that reaches your eardrums by as much as 12 decibels, effectively decreasing the AC noise to the 30s if you’re using a 50s dB AC. Venting is also vital, especially when dealing with window and portable air conditioners.

Consider a Sound Blanket

Sound blankets are designed just for that – to dampen noise levels. An HVAC company can provide one specifically designed for the compressor component of the AC. They are an effective solution when you can’t move the air conditioner.

Ideally, a sound blanket provides about 5 decibels of sound insulation, equivalent to a 65% reduction in AC sounds that reach your eardrums. However, since several factors come into play, including environmental considerations, expect a noise reduction of 30-50%. Still great, right?

If you’re worried about the blanket increasing the AC’s operating temperatures, you only need to remember that the motor inside the air conditioner has internal cooling with refrigerant. Therefore, although placing a sound blanket over the AC might increase operating temperatures, the difference is marginal.

Install a Quiet Fence

A quiet fence around the AC’s outdoor component creates another sound barrier between the AC and the rest of the yard. These barriers won’t help with noise that rises vertically, but they significantly reduce horizontal noise. The good news – most of the noise we hear from the AC is horizontally-dissipated noise.

An added benefit of a quiet fence is that it protects the AC from leaves, twigs, and other debris that may otherwise find a way into the air conditioner. Aside from reducing operational efficiency by blocking airflow, debris inside the AC can cause a painfully-irritating grating noise.

When a Previously Quiet AC Becomes Noisy

It’s also possible that the quiet AC you bought a few months ago starts making strange and unpleasant noises. Here’s what to do when you hear these noises;

Understand What the Different AC Noises Mean

If you listen closely, you’ll notice that the noises from an AC don’t make the same sound. The type of sound could be a clue on what’s wrong with the appliance. Common sounds to keep an ear out for are;

  • Banging sounds: Banging sounds from your AC are usually a sign of loose or broken parts. In most cases, it’s a loose/broken connecting rod, piston pin, or crankshaft. It could also point to an unbalanced AC or an issue with the compressor. In all these cases, a professional diagnosis is recommended.
  • Buzzing sounds: A bussing sound can mean a lot of things. It could be loose parts, debris inside the AC, loose fan/fan blades, or an out-of-balance blower. Or, it could be a sign of a refrigerant leak causing the AC to freeze up. Dirty condenser coils or out-of-place condenser lines can also make buzzing sounds.
  • Clanking sounds: Clanking is another sign of loose parts/components. It could also point to failure inside the AC unit. Perhaps the compressor itself has become loose or needs replacement. If not, then it could be an out-of-balance indoor blower. When the blower is out of balance, the blades may hit other components, thus the clunking sounds.
  • Clicking sounds: Clicking is mostly associated with electrical components, especially at start-up and shutdown. Indeed, it’s considered normal. The clicking only becomes an issue when it’s constant and too loud. In most cases, that’s a sign of defective control or a failing thermostat. Additional diagnosis by a professional is recommended.
  • Squealing sounds: If your AC is making loud squealing sounds, it’s likely a problem with the blower or fan. Often, it’s a sign that the fan or blower motor is going bad. The blower housing and wheel may also squeal if they malfunction. Pay close attention to determine whether it’s a usual occurrence or a new phenomenon.
  • Chattering/rattling sounds: Chattering and rattling sounds are the first sign of wear and tear. They are the clearest indicator that your air conditioner is starting to deteriorate, with some of the parts becoming loose. If not, then it could be debris, such as leaves, inside the air conditioner. Tightening the screws, cleaning the unit, and changing a few parts, such as the filter, may fix the problem.
  • Screaming sounds: This is the worst possible sound that can come out of your AC. It’s a sign of danger – most likely a refrigerant leak. Refrigerant leaks can damage the air conditioner and are a health risk for home occupants. If it’s not a refrigerant leak, it’s likely a surge in AC air pressure, which is also very dangerous. In both cases, you need to call an HVAC professional right away.

Ensure Proper Maintenance

Ideally, you want an HVAC professional to handle the maintenance. But, there’s no harm in knowing what AC maintenance entails. The following are some of the steps to take;

  • Change the filters as necessary: If the AC has reusable, washable filters, wash them as recommended by the manufacturer. Otherwise, replace them as directed. Most of them need to be replaced every o1-3 months.
  • Clean the air conditioner coils: The evaporator and condenser coils gather dust and dirt over time. This dirt can reduce efficiency and result in strange noises. Scheduled cleaning can help prevent this problem.
  • Remove debris from the unit: Yes, debris can find a way into the outdoor unit. These may include grass, leaves, twigs, etc. These can reduce operational efficiency and cause noise, thus must be removed during scheduled maintenance.
  • Straighten the fins: The aluminum fins on the evaporator and condenser coils are easily bent, blocking airflow, resulting in strange noises. Your technician will look at them annually and straighten any bent ones.

Repair on Time

Even with regular maintenance, you may still run into issues that may impact your AC’s efficiency and quietness. On-time repairs by a licensed professional are recommended to prevent further damage and prolong the AC’s life.

Know when it’s Time to Replace

First off, air conditioners aren’t designed to last forever. They have a lifespan beyond which they become less efficient and may produce all kinds of noises. For many models, that lifespan is 15-20 years. If your AC has outlived that lifespan and is making lots of noises, it may be sensible, financially, to replace than repair.

Secondly, an AC can also become damaged beyond repair even before it reaches its lifespan – your HVAC technician will know better. If this happens, it may also make more sense to replace the unit rather than persist with a totaled AC.

The 8 Quietest Air Conditioners Reviews

1. Midea U Inverter Window Air Conditioner

Midea U Inverter Window Air Conditioner 8,000BTU,...
  • More than 35% Energy Savings: With the advanced DC Inverter technology, Midea U achieves over 35% energy savings compared to other traditional units, and it's the first window AC to obtain the ENERGY STAR Most Efficient 2020 Certification. You may also get exclusive benefits from your local energy distributor
  • Extreme Quiet: 9 times quieter than some traditional units. The U-shape blocks the noise from the cooling system using your window. This design allows for extremely quiet operation as low as 42 dBA - almost as quiet as a library – so you can get a restful night’s sleep or binge your favorite shows undisturbed
  • Flexible window open: Midea U-shaped design allows your window to open, bringing fresh air into your home anytime allowing you to maintain more of your view.Refrigerant:R32
  • Smart Control: The Midea U is Wi-Fi- enabled, it can be controlled from anywhere through the cloud using the MideaAir app on iOS or Android. You can also use voice commands with Alexa or Google Assistant if you prefer
  • Robust Installation: Support bracket is included for a more robust installation that supports the unit with the window open or closed. Available for single-hung or double hung window with size: 22-36 inches, minimal height at 13.75 inches.

This quietest 8000 BTU window air conditioner features a U-shape and is one of the very first U-shaped window ACs. A key advantage of the U-shape window AC design is that it allows you to open your window to enjoy fresh air even with your AC installed. It is incredibly efficient and became the first window AC to obtain the Energy Star Most Efficient 2021 certification.

Onto the quietness, the U-shape of the Midea keeps the noise coming from the compressor outside, resulting in an impressively quiet indoors. As a result, you’re guaranteed sound levels as low as 42 decibels.

For a window air conditioner, this is almost unmatched. Other key features of the Midea include smart control (compatible with Google Assistant and Amazon Alexa) and MideaAir app control (on both iOS and Android).

The installation process is simple, with support brackets included that support the AC whether the window is open or closed. It requires a 22-36 window width and 13.75 minimum window height.

Pros

  • Very quiet for a window AC
  • Saves 35% more energy
  • Energy Star Certified
  • Smart home compatible
  • Inexpensive

Cons 

  • 8,000 BTU is ideal for smaller spaces
  • Short warranty (1-year)

2. Bosch Thermotechnology Ultra-Quiet 12K BTU 115V Mini Split

Bosch High Efficiency Ultra-Quiet Mini Split Air...
  • COMPACT AND EASY: Aesthetic and modern indoor air handler with compact and easily concealed outdoor condenser unit that comes with 25 ft. of pre-charged refrigerant
  • WIDE RANGE: 12,000 BTU cooling capacity, ideal for rooms up to 400 square feet, the unit provides heat with outdoor temps down to -13 degrees F (provides cooling up to 122 degrees F outdoors)
  • ENERGY EFFICIENT: Energy Star certified for greater efficiency and lower energy costs - 20.9 SEER and 10 HSPF Rated
  • REMOTE SETTINGS: Wireless back-lit remote with Silent mode, timer, Follow-Me, and Turbo speed settings for the highest level of home comfort
  • INCLUDES: Indoor air handler and outdoor condensing section - requires line set for complete assembly (sold separately)

Also known as the Climate 5000, this 12,000 BTU AC from Bosch is an excellent choice for on-demand comfort. It’s a mini-split AC, meaning that the condenser unit installs outside the house while the air handler installs inside.

This significantly reduces noise. It’s rated 41/36/28/23 (High/Medium/Low/Night) decibels and has a Silent setting that reduces sound to around 20 dB, which is the sound of a TV. This makes it a great AC for quiet operation areas, such as the bedroom and study rooms.

Aside from the quiet operation, the Climate 5000is very efficient at cooling (rated 22 SEER) and heating (rated 10 HSPF). A wireless backlit remote control is included in the package for easy climate control. The AC also features a timer and follow-me temperature control. You’ll also love that it comes with 25 feet of line set pre-charged with refrigerant.

This quietest mini-split AC is recommended for rooms measuring around 400 square feet and is Energy Star certified. It’s backed by a 7-year compressor warranty and 5-year parts warranty.

Pros

  • Very quiet (20 dB quietest setting)
  • Impressively energy efficient at 22 SEER
  • Great supplemental heater (10 HSPF)
  • Plugs into 115V outlet
  • 5-year parts warranty

Cons 

  • Most expensive product on this list

3. Whynter ARC-14S 14,000 BTU Dual Hose Portable Air Conditioner

Sale
Whynter ARC-14S 14,000 BTU Dual Hose Portable Air...
  • 14,000 BTU (ASHRAE) / 9,500 BTU (SACC) cooling capacity
  • Award Winning: 1. Good Housekeeping's "2020 Best Overall" and "can cool down a room faster than other portable units" 2. Consumer Report's 2020 Highest Score; UL listed
  • Dual hose operation; Cools up to a 500 square feet space(ambient temperature and humidity may influence optimum performance); Dehumidifying capacity: 71 pints per day; Air Flow (at high speed): 430 m3/h / 253 CFM; 3 fan speeds
  • Three operational modes: Air conditioner, dehumidifier or fan; Cooling capacity 14000 BTU (ASHRAE-128 Standard) / 9500 BTU (DOE+ 2017 Standard); Maximum power consumption: 1300 W / 11.6 A.
  • Eco-friendly CFC free Green R-32 refrigerant; Extendable exhaust hose (up to 60″); Window kit dimension: 6.5″ W x 20″ L (minimum), 46″ (maximum); Unit dimensions: 19″ W x 16″ D x 35.5″ H

The Whynter ARC-14S 14,000 BTU Dual Hose Portable Air Conditioner is one of the quietest portable air conditioners that comes with a dual hose to offer impressive cooling and heating capacities.

It has durable caster wheels and handles to help you carry and easily move it from one room to another. If you don’t mind installing and uninstalling it frequently, you don’t need to purchase separate units for all of your rooms.

This product has a programmable 24hrs timer that lets you set when it turns on and off o set on and off time to conserve energy and get your room in good condition when needed. Another essential feature we cannot ignore is the auto restart. When power is restored after an outage, the unit will resume operation as per your last settings.

PH14B also employs a self-draining mechanism to eliminate the need to keep checking and emptying the reservoir. As such it is easy to maintain the unit in good working conditions, devoid of frequent shutdowns.

The manufacturer took into account the changes in weather and incorporated a heating element to allow this unit to serve you well during the cold season. Bundled with that is an inbuilt dehumidifier to cleanse the air and remove excess moisture that can be harmful to your health.

Pros

  • Comes with an auto-restart feature
  •  It highly portable
  • Comes with a dual hose for faster cooling
  • Self-draining mechanism
  • It’s a multipurpose design

Cons

  • Non-friendly user interface 

4. Emerson Quiet Kool 230V 10,000 BTU Wall Air Conditioner

Emerson Quiet Kool 230V 10,000 Wall Air...
  • EXCLUSIVE 1-2-5 WARRANTY: Your Emerson Quiet Kool Wi-fi enabled air conditioner comes with an industry-exclusive 1-2-5 warranty that covers 1 year of labor, 2 years of parts, and 5 years on the compressor. Buy and use with confidence.
  • QUIET COOLING AND HEATING: This through the wall air conditioner (10,000 BTU cooling / 10,600 BTU heating) efficiently cools and heats up to 450 sq. ft. At 55dB, this unit is among the quietest in the industry, making it ideal for bedrooms and other medium sized rooms. (Product is not suitable for window installation)
  • LCDI NEMA 6-20P PLUG: 4.8 ft power cord with special LCDI NEMA 6-20P plug requires 230 volt/20 amp outlet, and is unable to be plugged into a standard 115V electrical outlet.
  • SPLIT AIR EXHAUST VENTS: Two air exhaust vents (instead of one) combine with three fan speeds to give you 8-way flexibility to direct the flow of air where you want it when you want it.
  • PROGRAMMABLE TIMER AND SLEEP MODE: Integrated 24-hour timer can be set via on-board controls, remote control, phone/tablet app, or voice controls. Intelligent sleep mode goes one step further by slowly adjusting the temperature and fan speed to keep you comfortable overnight while saving you energy and money.

Finally, not often will you find wall air conditioners on a list of the quietest ACs, but the Emerson EATE10RD2T makes the cut. It’s among the quietest through-the-wall ACs globally, producing just 55 decibels.

This is simply outstanding for a wall AC. The manufacturer strongly prohibits installing the EATE10RD2T through the window, though.

The 10,000 BTU AC is recommended for spaces up to 450 square feet and can also function as a heat pump (10,600 BTU). It fits most existing wall sleeves and includes a decorative interior trim kit to blend with indoor décor. However, you’ll need a 230V outlet as the appliance cannot work with the standard 115V household electrical outlet.

Other features that stand out about the Emerson AC include the split air exhaust vents (instead of one) that combine with the three-way fan speed to give you 8-way climate control options.

The programmable timer and sleep mode are designed to increase user convenience, as are the smart control features, including voice, remote, and phone/tablet control.

Pros

  • Fairly quiet for a wall AC
  • 4-in-1 air conditioning
  • 2-year parts warranty
  • 5-year compressor warranty

Cons 

  • Requires 230V wiring

5. DeLonghi 3-in-1 Portable Air Conditioner, Dehumidifier, Fan 6,800 BTU

De'Longhi PACN285GN 3-in-1 Portable Air...
  • MULTI-FUNCTION FOR MAXIMUM COMFORT: This powerful 3-in-1 unit features cooling, dehumidifying and a fan, cooling rooms up to 550 sq. ft.
  • PORTABLE COMFORT AND EASY SET UP: Sets up in minutes with no tools required. Built-in caster wheels and integrated handles allow you to move it easily from room to room (unlike window units)
  • LOWER ENERGY BILLS: By cooling only the room you’re in, you can raise your thermostat and lower your energy bills right from the start
  • NO DRIPS, NO LEAKS: No-drip technology automatically recycles condensation within the unit, helping to prevent any type of leaks. (Draining may be required in highly humid climates)
  • FULL FUNCTION REMOTE: Comes with a full-function remote, featuring an LCD display to control all of its settings, including the adjustable thermostat, 3 fan speeds, mode selection and a 12-hour on/off timer

A few people also prefer the convenience of portable ACs that you can carry from one room to the other with ease. If you’re one of these people, the DeLonghi PACEX140ES is one of the quietest portable air conditioners today.

It’s rated 55 decibels but features a few tranquil settings, some as quiet as 52 decibels. The manufacturer says that the low noise output is primarily because of optimized airflow.

Away from the sound ratings, the PACEX140ES is a beauty to reckon with. It features a compact design and striking finish that fits most decors. It’s also lightweight at about 72 lbs. and measures around 14 x 16.2 x 31.5 (depth x width x height), so shouldn’t take up much space or become difficult to move around.

It features digital controls, a 24-hour timer, folding castor wheels, and side handles. This AC is recommended for spaces up to 600 square feet

Pros

  • Quiet at 52-55 decibels
  • Portable for easy maneuverability
  • No drip, no leaks
  • Full-function remote control
  • Error codes displayed

Cons

  • Short warranty (only one year)

6. Pioneer Air Conditioner WYS012A-19 Wall Mount Ductless Inverter Mini Split

Sale
Pioneer Air Conditioner WYS012A-19 Wall Mount...
  • Save money all year-round with a highly efficient ductless mini split inverter+ heat pump system
  • Ultra-silent and beautifully built perfect for home or light commercial use
  • Comes with every needed component in the box, including an easy-install 16ft copper piping kit
  • Use for both cooling and heating: 12000 BTU/hour with 19 SEER and 10 HSPF efficiency
  • Free tech support and a 5 year coverage on the compressor
  • Voltage 110 120 VAC 60 Hz (standard household power l-n-g)

Another mini-split on the list, this Pioneer AC is rated 12,000 BTU and recommended for spaces between 350 and 450 square feet. It doubles up as a cooler and supplemental heater. In both cases, it delivers 12,000 BTU.

It’s one of Pioneer’s quietest mini-splits. The indoor unit is rated 38/32/24 decibels (High/Medium/Low) while the outdoor compressor is rated 55 decibels. That’s lower than 80% of the mini-splits you’ll come across.

Aside from the impressive quietness, the WYS012A-19 stands out for its incredible energy efficiency. It’s rated 19 SEER and 10 HSPF. The AC also boasts front panel smart control, refrigerant leak detection, and permanent washable filters. It comes pre-charged with R410a refrigerant up to 25 feet.

This air conditioner is certified by both AHRI and Intertek. It’s also UL listed and features a durable galvanized metal construction with electrostatic epoxy paint for longevity. It’s backed by a 5-year compressor warranty and 2-year parts warranty.

Pros

  • Very quiet at 24 dB (quietest setting)
  • AHRI and Intertek Certified
  • Doubles up as a heat pump
  • Wireless remote control
  • 2-year parts warranty

Cons 

  • Not Energy Star rated
  • Requires 220-240V wiring

7. Senville SENL-24CD Mini Split Air Conditioner Heat Pump

Senville LETO Series Mini Split Air Conditioner...
  • 4-in-1 Mini Split Air Conditioner with Heat Pump. Built-In Air Conditioning, Heating (Up to 5F/-15C), Dehumidifier, Fan and Turbo Function.
  • Great for Bedrooms, Additions, Living Rooms, Garages, and Commercial Applications. Can Be Installed in Virtually Any Home, Condo or Space.
  • Whisper Quiet Operation (28dB). Energy Efficient Consumption and Engineered for the Harshest Climates.
  • 5 Year Manufacturer Warranty. Senville Trusted Quality and Design. Free Technical & Installation Support Included.
  • Includes 16 Ft. Installation Kit with Communication Cable and Copper Lines (Pre-Flared) and Remote Control. R410A Refrigerant *Requires Professional Installation for Warranty to be Valid..

The SENL-24CD from Senville is the largest (capacity-wise) AC on this list at 24,000 BTU. This makes it suitable for large spaces. The manufacturer says you can use it in spaces up to 1,200 Sq. Ft., but it works best in rooms around 1,000 Sq. Ft.

In terms of quietness, it’s also one of the quietest ACs you’ll find, thanks to the mini-split design and DC inverter technology. The indoor unit rated 48/42.5/34 (High/Medium/Low) while the outdoor compressor is rated 58 decibels.

It’s also a very energy-efficient air conditioner (rated 17 SEER) and works doubles up as a heat pump (up to 15c/5F). Built-in de-humidification, fan-only function, and turbo setting are other key features of the AC.

The package includes a 16-foot installation kit, communication cable, and copper lines (pre-charged to 25 feet) at no additional cost.

This air conditioner is ETL certified, AHRI certified, and backed by a 5-year compressor warranty and 2-year parts warranty.

Pros

  • It’s a 4-in-1 mini split
  • Very quiet at 34 dB (quietest setting)
  • Very efficient at 17 SEER
  • Ideal for up to 1,200 square feet
  • Remote control
  • 2-year parts warranty

Cons

  • Requires 220-240 volt wiring
  • Installation is a tedious process

8. Haier ESAQ406T 22″ Window Air Conditioner

Haier ESAQ406T 22" Window Air Conditioner Serenity...
  • 2016 energy star: 12.2 efficiency Ratio (EER)
  • 6, 000 BTU room air conditioner for window-mounted installation (Min/Max Window Width: 26.07/39.25 inches; Min Window Height: 13.38 inches)
  • 4 functions include cool, energy save, fan and Dehumidify
  • Full-function remote control with LED display, plus button lock and light
  • Run this Unit on your schedule with the 24-hour on/off timer

If you’d like low-noise air conditioning but aren’t a fan of the split systems, Hair’s window ACs would be a great pick.

Window ACs aren’t usually the quietest but, they’re some of the most functional AC because of the ease of installation. Also, you don’t need to bore a hole through your wall to install a window AC. For this reason, a lot of people love them.

The model ESAQ406T comes with all these perks, without compromising the quietness in your home. Rated at just 43 dB, it’s one of the quietest 6000 BTU window air conditioners.

You’ll also love that it’s very energy efficient (rated 12.2 EER) and works as a fan and dehumidifier. A full-function remote control makes it easy to switch between these functions. A 24-hour timer is also available.

Other key features of the AC include 3-speed fan control, a thermistor thermostat, a 4-way louver system, and infrared remote control. You need a 26.07/39.25 (min/max) window width and 13.25 window height for the installation. It’s backed by a 1-year compressor and 1-year parts warranty.

Pros

  • Impressively quiet for a window AC
  • Plugs into standard electrical 115V outlet
  • Sleep Mode is available
  • Washable mesh filter
  • Convenient remote control
  • Energy Star qualified

Cons

  • Small capacity at 6,000 BTU
  • Ideal for smaller spaces (100-150 Sq. Ft.

 

As you can tell from the product reviews, all air conditioners make some sound when operating – even the best ones. The noise comes from the normal operation of the AC. If your AC doesn’t produce any sound at all, then there’s likely a problem with the unit.

Models that utilize a blower fan to circulate air throughout the room typically make even more “noise” as the fan blades rotate.

The rest of this guide is designed to help you understand more about air conditioner noise – where it comes from, how the noise is measured, the various factors that affect AC noise, and what qualifies as “low-noise” air conditioning.

Conclusion 

When choosing a new air cooling unit, it’s always important to do research beforehand. Whether you’re looking for an old model or the newest model with the latest technology, you still want to make sure that the product you choose does its job as advertised.

One of the best ways of finding the best quiet air conditioner, especially if you’re shopping online, is by reading previous customer reviews, ratings, and opinions. You’ll often find some customers highlighting both the positive and negative experiences they had with the units. That way, you can make an informed decision about a specific model you want to purchase.

We hope this quietest air conditioner reviews help you narrow down your choices for the best air conditioner for your home.