Best Quietest Air Purifier – Detailed Noise Analysis And Comparison

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We live in a fast paced society with exciting vibrancy and never-ending action. This heightened state can be exhilarating but many of us also crave the alternatives of calm, quiet and the chance to switch off. Our homes can be that sanctuary.

In order to refine the sound environment at home and achieve the best balance of silence and functionality, homeowners will need to source for the best quiet home appliances. Air purifiers are no exception. However, there are thousands of models available on the market and homeowners can get confused. Therefore, we did the research for you so that you will be able to get the best deal for your money.

Below, you will find a list of 5 best air purifiers from reputable international brands, all geared towards maintaining a peaceful and quiet home environment, each with their pros and cons clearly stated.

Coverage AreaWarrantyFilter replacementNoise Level
Blueair Blue Pure 411161 sq. ft.2 years6 to 8 months17-46 dB
Levoit LV-H132 H13 Air Purifier129 sq. ft.2 years6 to 8 months25-46 dB
Winix 5500-2 Air Purifier360 sq. f.t1 year12 months 28-45 dB
TaoTronics TT-AP001161 sq. ft.1.5 years3 to 6 months25-45 dB
Hathaspace Smart Air Purifier350 sq. ft.2 years4 months20-45 dB
Best Quietest Air Purifier

You’ll also find a buyers’ guide where you can read our rationale when deciding how to rate these products, and hopefully you can use it yourself when making future purchases.

In a Hurry? This Is Our Winner!

Blueair Blue Pure 411 Air Purifier

Best Overall Quiet Air Purifier

Product Overview

  • Dimensions: 8” x 8” x 16.7”
  • Weight: 3.35 lbs
  • Coverage area: 161 sq. ft. (15sqm)
  • Clean air delivery rate (CADR): 105㎥ / hr
  • HEPA Filter/Carbon filter replacement frequency: every 6 to 8 months
  • Warranty: 2 years (product registration through Blueair)

Designed mainly for a smaller room, the Blueair air purifier can purify the air in a room of up to 175 sq. ft. It features a no-frills but functional 3-part filtration system that consists of a pre-filter, HEPA-like filter and an activated carbon filter. Between them, they will be able to trap the large airborne particles, odors and up to 99% of particles that are as small as 0.3 microns. This effectively makes your room free of many allergens such as pollen, dust mites, pet dander, mold spores and tobacco smoke.

The defining feature of this air purifier is the quietness of it. The reason why it is our preferred choice in this review of the quietest air purifier is because it generates the least amount of noise. The noise level of this unit is between 17 to 46 dB. For those wondering, 17 dB is even quieter than the whisper of rustling leaves. The quiet operation makes his air purifier the perfect choice in a bedroom, baby nursery and even offices.

If you need any more convincing about the quietness, this air purifier was also awarded the Quiet Mark certification which is an internationally recognized award for the quietest home appliance on the market. 

Regarding the functionalities, this unit comes with just one button for control. There are no adjusting settings and knobs. There is just a single button to control it all and gives you the indication when a filter change is required. It does so by glowing red when it is time for a change. This design makes it extremely convenient and user-friendly for the consumer. The Blueair purifier is also designed with 360-degree air intake which means that it can be placed almost anywhere in the room without compromising performance. This is unlike some air purifiers which have strict rules for placement.

In summary, the main selling point is the quietness and homeowners can definitely consider this for their bedroom if they are very noise-sensitive. While it is not a true HEPA filter, it can still do a good job of purifying the air by removing up to 99% of fine airborne particles.

Pros

  • Extremely quiet
  • Functional filtration system that gets the job done
  • 360 deg air inlet for easy placement
  • Easy control and user-friendly

Cons

  • HEPA-like filter instead of true HEPA
  • Only for smaller rooms

What the fans love: “The fact that these work so well and so quietly makes our family very happy. We now have one in each bedroom to try to keep our air as clean as possible to prevent phlegm buildup and allergens, and knowing that we have another small level of protection from COVID (just in case) is very reassuring.”


Best Quietest Air Purifier Buyers’ Guide

Considerations When Choosing The Quietest Air Purifier

Coverage Area

When choosing your air purifier, you need to find out the size of your room as accurately as possible to avoid disappointment. The easiest way to find out the size of your room is to measure the length and breadth of your room and then multiply them together.

Once you have an idea of the actual size of your room, you can look at the models of air purifier that you are interested in. Almost all manufacturers will list down the coverage area of their humidifiers in the product overview. These give you a good indication of what size room the air purifier is best for. 

When looking at these values provided by the manufacturers, I would probably round them down by about 20%. For example, the manufacturer may say that the air purifier can cover an area of 500 sq. ft. but I would take away 20% from that and estimate the coverage area to be about 400 sq. ft. This is because these values were probably measured in an ideal environment where there are no leaks or drafts in the room. In real life, we may have leaky windows, wall cracks, door gaps that may contribute to the reduced air quality.

Noise Level

What is a review on the best quiet air purifier if we don’t talk about the noise level of these air purifiers. Sound or noise is typically measured using decibels (dB) and depending on the make of the heater, the noise level can go up to as high as 60 dB.

For an estimate of how 60 dB sounds like, have a look at the infographics below!

noise decibel chart

The safe limit recommended by experts at the US Environmental Protection Agency is 70 dB but that is relevant for workspaces only. In our homes, a reasonable limit to aim for would be anything below 45 dB. Any noise beyond that would tend to disturb you or your family member‘s rest. This is especially so if you are planning to use the air purifier in your bedroom, study room or a baby nursery. Having a quiet air purifier in these rooms is crucial for getting good rest and improving concentration. 

For many of us who may be suffering from asthma and allergies,  the allergies get worse at night when we are trying to go to bed. Hence, having the air purifier turned on while we sleep is crucial for us to get a good night rest. Since the air purifier will be working in our bedroom, having a quiet air purifier will ensure our sleep does not get interrupted by the air purifier. 

If you like to find out more about the health effects of prolonged exposure to loud noises, do check out our post on how noise pollution affects your health!

Certification

When choosing quiet air purifiers or quiet home appliances in general, having a Quiet Mark Certification is always a clear sign that the appliance has passed stringent testing and assessment to be identified as a quiet product.

Quiet Mark is an independent, international approval award programme associated with the UK Noise Abatement Society. It encourages companies worldwide to prioritise noise reduction within the design of everyday machines and appliances. Any quiet product identified and endorsed by Quiet Mark would have undergone scientific testing and assessment. Consumers can rest assured that the product they are getting is probably one of the quietest in a given category.

Fan Speed

Another factor that would affect the noise level of an air purifier is the fan speed. Air purifiers usually have a few fan speed settings which will vary in the amount of noise it generates. Low fan settings will generate the least amount of noise while the highest fan setting may generate high levels of noise. When choosing a quiet air purifier, you will need to look at both ends of the spectrum to ensure that the high fan setting is still quiet enough for your needs. Most air purifiers will be quiet when using the low fan setting and the real difference comes when using the high fan setting.

Warranty

For any electrical appliances, the length of warranty is always something to consider. Obviously the longer the warranty, the better it is for the consumer. A long warranty is also suggestive that the company is very confident of their product’s longevity and durability. Generally in the air purifier sector, a warranty period of 1 to 2 years is quite reasonable and anything beyond that is considered good.

Portability

Air purifiers can come in a few different designs. The common models are compact, tower and wall mounted. Each design would have its pros and cons and suitability in different situations. If there are multiple rooms in your home affected by smoke, getting a portable air purifier would be a safe bet. Alternatively, home owners may opt for a whole house air purifier but it is still limited by corridors and doorways. 

considerations for choosing air purifier

How Does An Air Purifier Work

Air purifiers work by moving air through filters that clean the air and then recirculating the “cleaned” air back into the room. The key to their effectiveness lies in these filters. Most air purifiers now contain multiple filters that are responsible for cleaning different components of the air it sucks in.

HEPA filters

HEPA (high efficiency particulate air) filters are the cornerstone of all air purifiers on the market now. It is a filter that is usually made of fibreglass in a maze-like tangle of fibres. To satisfy HEPA requirements, a candidate filter must remove 99.97% of particles of diameter 0.3 μm, with even greater filtering efficiency for larger and smaller particles.

HEPA filters require regular replacement and filters can last between 6 months to a year before it needs a replacement. When purchasing an air purifier, it is worth considering how frequently the filter needs replacing and the cost of a replacement filter to get a feel of the true cost of your air purifier.

True HEPA Filters

Activated Carbon Filter

This is an adsorbent type filter that is made from processed carbon. The carbon is processed into an extremely porous form to increase surface area for absorption. The main objective of this filter is to capture volatile organic compounds and gaseous compounds. Unlike a HEPA filter, activated carbon filters cannot trap particles like dust and pollen. However, it can capture and remove odors and gaseous chemicals that HEPA filters are weak at.  Therefore, activated carbon filters usually act as a pre-filter to a HEPA filter.

 An activated carbon filter also requires replacement when it becomes saturated. Buyers also need to check in with the manufacturers regarding the replacement frequency and how expensive a replacement is.

Activated Carbon Filters

UV Light filter

Some air purifiers contain an ultraviolet light filter that is advertised to be able to kill bacteria and viruses. It achieves this by using UV rays to break down the chemical bond between virus DNA and hence rendering them inactive. The biological principles are sound but critics are not convinced that a UV light filter is really effective in killing viruses. Their argument is that air passess too fast through the light for the UV rays to have any effects. For now, the jury is still out so buyers do have to weigh the additional costs against the potential benefits and see if it is worth it for them.

Another criticism of UV light filters is that it may produce ozone. Ozone is a by-product from the breakdown of oxygen and can cause a variety of respiratory symptoms in humans. However, numerous testing have shown that the amount of ozone produced, if any, is extremely low and falls well within the safe range of human exposure.

UV light filters are not replacements for HEPA filters but act as an adjunct to them. UV light filters do not require replacement unless the light bulbs blow.

Negative Ion Filter

These filters may also sometimes be known as ionic filters. They work by producing negatively charged ions that can attach themselves to particles floating around in the air. The ionized particles then settle on surfaces which allows for them to be wiped away. The main advantage of these filters is that they are extremely quiet as they do not require a fan.

These filters were very popular in the 1990s and early 2000s. However, they are now displaced by HEPA filters. Part of the reason is because ionic filters may produce ozone that can cause respiratory problems in humans. However, numerous testing have shown that the amount of ozone produced, if any, is extremely low and falls well within the safe range of human exposure.

Ionic filters do not need replacements as air do not pass through them and they will not get clogged up.


Best Quietest Air Purifier Product review

Levoit LV-H132 H13 True HEPA filter Air Purifier

Best Quiet Air Purifier For Asthma And Allergies

Product Overview

  • Dimensions: 8.5” x 8.5” x 14.5”
  • Weight: 6.6 lbs
  • Coverage area: 129 sq. ft. (12sqm)
  • Clean air delivery rate (CADR): 12㎥ / hr
  • HEPA Filter/Carbon filter replacement frequency: every 6 to 8 months
  • Warranty: 2 years

The Levoit LV-H132 air purifier is designed for smaller rooms of up to 129 sq. ft. It comes with a 3 stage filtration system that consists of a fine pre-filter, true HEPA filter and an activated carbon filter. Between these 3 filters, it would have removed about 99.97% of airborne allergens such as pollen, dust and mold. Besides these, this air purifier is also effective against pet fur, pet dander and other fine particulate pollutants. While there are no fancy UV lights or ionizing filters, it gets the job done effectively with minimal fuss.

Depending on your needs, you may choose from 3 different fan speeds, Low, Medium and High. At the low setting, users should expect a noise level of about 25 dB which is ultra quiet while it can go up to 46 dB at the high fan setting. If users are intending to use this during bedtime, both the low and medium fan speed will be comfortable and silent enough not to disturb your rest. 

An additional feature of this air purifier is the gentle night light at the top of the unit. You may choose the brightness levels from dim to bright or even turn it off if you are sensitive to light. With the dim light, you can create a warm ambience in your living space when you are winding down for the night.

In terms of ease of use, this air purifier comes with just 4 buttons that are clear and easy to control. All the settings can be easily adjusted with these 4 buttons and really improves the user-friendliness of this unit. The buttons are also really sensitive which may be a boon and a bane to some as it can get annoying when you accidentally change your settings just by brushing against it. Another factor that adds to the ease of use is the portability. Weighing just 6.6, this air purifier can be easily transported between rooms for different uses. 

The limitation of this air purifier is that it is only able to clean a small room which usually limits its use to the bedroom or study room. It would lose its relevance in larger living spaces like the living room.

In summary, this is an air purifier which will serve most of your needs. It does a great job of cleaning the air without too much frills. For users looking for a clean functional unit that is forced reasonably, this is the one to get.

Pros

  • Adequate filtration system with pre-filter, HEPA filter and activated carbon filter
  • Quiet at low and medium setting
  • Night light feature
  • Light and portable

Cons

  • Can only clean a small room
  • Buttons too sensitive

What the fans love: “I really like this unit. It is easy to use. The noise is very soft, and not at all disruptive. Kind of like soothing white noise in the background. It looks nice. I can tell that my air seems cleaner. The filter is easy to remove and replace. Overall I’m happy with this purchase!”

Winix 5500-2 Air Purifier

Best Quiet Air Purifier For Large Room

Product Overview

  • Dimensions: 15” x 8.2” x 23.6”
  • Weight: 15.4 lbs
  • Coverage area: 360 sq. ft. (33sqm)
  • Clean air delivery rate (CADR): 360㎥ / hr
  • HEPA Filter/Carbon filter replacement frequency: once every 12 months
  • Warranty: 1 year

The Winix 5500-2 air purifier is a unit designed for larger rooms that can go up to 360 sq.m in size. It comes armed with a 4 stage filtration system that includes a washable pre-filter, a washable activated carbon filter, a true HEPA filter and the latest PlasmaWave technology. The pre-filter will be the first line of defence against the larger airborne particles, while the odors and finer particles will be managed by the HEPA and carbon filter. Lastly, the PlasmaWave filter acts to neutralize bacteria and viruses. For asthmatic homeowners struggling with allergies at home, this purifier got you covered and you can be assured of fresh clean air at home.

In terms of customization, this air purifier comes with an AUTO mode that is designed for convenience and efficiency. When using the AUTO mode, this unit is able to adjust its fan speed automatically based on the real-time air quality. This is made possible by a smart air quality sensor that detects and displays the indoor air quality in real time. This is a very useful feature for users that like that just want the job done without too much overthinking

Besides the air quality sensor, there is also an odor sensor and a light sensor. During Auto mode, the odor sensor detects the amount of odor in the environment to adjust fan speeds. The light sensor detects the amount of ambient light within the environment to adjust the brightness of the LED indicators.

Another mode that deserves a mention is the Sleep mode that is activated automatically when the room is darkened. The sleep mode ensures a quiet and energy efficient operation through the night that doesn’t disturb the user. During Sleep mode, the noise level is about 28 dB. Once the light is turned on again, the purifier will return back to Auto mode. For homeowners big on convenience, you will also appreciate the remote control that allows easy and convenient adjustment from the comfort of your couch.

There are 2 limitations to this air purifier. Firstly, there is no way to override the auto sleep mode. Therefore, if your house is fitted with dim lighting, this purifier will just be functioning at the low setting as it is in “sleep mode”. Secondly, the filter replacement is one of the most costly ones on the market. Thankfully, the replacement frequency is only once a year but these do add up if you intend to use the air purifier for a long time.

In summary, this is an air purifier loaded with features which can be really useful if you know how to make use of them. It is a little on the pricier side but it justifies the price tag with its quality. 

Pros

  • Comprehensive filtration system
  • Auto mode for convenience
  • Sleep mode with dimmed lights and quiet fan
  • Remote control enabled
  • Real time air quality sensors

Cons

  • Unable to override the automatic sleep mode
  • Expensive filter replacement

What the fans love: “This machine is amazing! In about an hour all smoke odor was gone and so far when set on “auto” it has kept the air fresh. The fan on the low setting is so quiet you have to hold your hand over the exhaust to see if it is running, even on the “high” setting it is quiet enough for a normal conversation. It is not overly large and being only about 7-8″ deep it fits against a wall making it less noticeable. The front access panel is held in place with magnets so it opens very easily making cleaning or changing filters a breeze”


TaoTronics TT-AP001 Air Purifier

Best Quiet Budget Air Purifier

Product Overview

  • Dimensions: 8.5” x 8.5” x 13.54”
  • Weight: 3.8 lbs
  • Coverage area: 161 sq. ft. (15sqm)
  • Clean air delivery rate (CADR): 150㎥ / hr
  • HEPA Filter/Carbon filter replacement frequency: once 3-6 months
  • Warranty: 1.5 years

The TaoTronics air purifier is designed for smaller rooms of up to 161 sq. ft. It comes with a 3 stage filtration system that consists of a pre-filter, HEPA filter and an activated carbon filter. Between these 3 filters, it would have removed almost all of the airborne toxins and odor from a home with cigarette smoke. Besides these, this air purifier is also effective against pollen, dust, pet dander and other allergens. While there is nothing fanciful about this, it gets the job done effectively with minimal fuss.

Depending on your needs, you may choose from 4 different fan speeds from Low to Turbo. At the low setting, users should expect a noise level of about 25 dB which is almost indiscernible while it can go up to 45 dB at the turbo setting. If users are intending to use this during bedtime, even the high fan setting will be comfortable and silent enough not to disturb your rest. 

An additional feature of this air purifier is the gentle night light at the top of the unit. You may choose the brightness levels from dim to bright or even turn it off if you are sensitive to light. With the dim light, it can be suitable for a young child’s room who may ask for a night light to accompany them to bed.

In terms of ease of use, this air purifier comes with just 4 buttons that are clear and easy to control. All the settings can be easily adjusted with these 4 buttons and really improves the user-friendliness of this unit. Another factor that adds to the ease of use is the portability. Weighing just under 4 pounds, this air purifier can be easily transported between rooms for different uses. 

The limitation of this air purifier is that the filter does need to be replaced more frequently than most other brands on the market. Granted that the replacement filters are not expensive, the increased frequency of replacement may still add up quickly over time.

In summary, this is a compact air purifier that can effectively clean the air in a small room. The 3 stage filtration is functional and quiet during operation. For users looking for a convenient and hassle-free experience, this is the one for you.

Pros

  • Quiet operation even during high fan setting
  • Functional and adequate filtration system
  • Portable and compact
  • Easy to operate and use

Cons

  • Filter require frequent replacement

What the fans love: “I really like this unit. It is easy to use. The noise is very soft, and not at all disruptive. Kind of like soothing white noise in the background. It looks nice. I can tell that my air seems cleaner. The filter is easy to remove and replace. Overall I’m happy with this purchase!”


Hathaspace Smart True HEPA Air Purifier

Best Quiet Air Purifier For Allergies And Asthma

Product Overview

  • Dimensions: 13.5” x 7” x 19.5”
  • Weight: 12 lbs
  • Coverage area: 350 sq. ft. (32sqm)
  • Clean air delivery rate (CADR): 160㎥ / hr
  • Filter replacement frequency: Once every 4 months
  • Warranty: 2 year

The Hathaspace Smart air purifier is designed for large rooms and can purify air in areas up to 350 sq. ft. Featuring a 5 in 1 filtration system that includes a true HEPA filter and an activated carbon filter, homeowners will not have to worry about fine air pollutants and odors from infiltrating their homes and causing allergies to their family members. The other 3 parts to their filtration system include a cold filter for large particles, an antibacterial filter and an ionizer for smaller particles. 

In terms of customization, this air purifier comes with an AUTO mode that is designed for convenience and efficiency. When using the AUTO mode, this unit is able to adjust its fan speed automatically based on the real-time air quality. This is made possible by a smart air quality sensor that detects and displays the indoor air quality in real time. For users that like that just want the job done without too much overthinking, this is a lifesaver.

For homeowners who plan to use it through the night, you will greatly appreciate the Sleep mode that keeps noise levels as low as 20 dB when it is activated. The lights also turn off automatically during this mode, giving you the most restful and uninterrupted sleep

In terms of convenience, this air purifier comes with a remote control that allows the user to enjoy the flexibility of controlling the air purifier remotely. Homeowners can adjust their preferred settings from their bedside or couch without any issues.

The limitations of this unit include a short cord length of only 3 feet and hence you may need an extension cord to position this air purifier properly. Also, the sleep mode only allows the lowest fan speed which may not be suitable for all users as some would prefer a higher fan speed to clean the air better during their sleep. 

All in all, this air purifier has all the functions and does a fine job at purifying air. There are some minor inconveniences associated with this air purifier but they are definitely not dealbreakers and can be managed easily.

Pros

  • Comprehensive filtration system for pet fur, pet dander and pet odor
  • Remote control enabled
  • Quiet
  • Auto mode helps to regulate air automatically
  • Inbuilt air sensor

Cons

  • Short electrical cord
  • Sleep mode can only run at lowest fan setting

What the fans love: “If you are a dog person like me, then you know your house can start to develop that doggy smell that may not be as noticeable to you as it is to your guests. The 6 layer purifier is perfect for removing pet and other odors, plus captures their hair in the process. Two large openings allow air to pour in through the filter, and also let my dog hair in, both thick and thin. When you pull the filter out you can tell it does its job.”


Frequently Asked Questions (FAQs)

Q: Where is the best place to put an air purifier?

A: Long story short.

  • Close to the odor source
  • Bedrooms and areas with high human traffic
  • On the floor if your main problem is pet fur and dust on the floor
  • Elevated if you are dealing with smoke and soot
  • 8 inches away from walls and furniture
  • 12 inches away from electronics

If you like the full story, check out our guide on the best practices when positioning your air purifier!

Q: Should we shut the windows and doors when using an air purifier?

A: Almost all air purifier companies we interviewed recommend that windows and doors be closed while running the air purifier This improves both air cleaning efficiency and also energy efficiency giving the user better air quality and improved savings. In the case of cigarette smoke, homeowners are advised to open the windows and ventilate the room first. Once the majority of the smoke has left the room, then shut the windows to allow the air purifier to clean the remaining airborne chemicals.

Q: Does air purifier make air dry?

A: No. Air purifiers are unable to remove moisture from the air at all. Therefore it cannot dry up the air. Watch out for other possible reasons that might dry out the air such as a strong fan nearby. If low humidity is an issue, consider getting a humidifier.

Q: Which is better for asthma? Humidifier or air purifier?

A: Both will help asthma but in different ways. Humidifiers help to keep the indoor air moist so that the inhaled air does not dry up the nasal passages and irritate it. Air purifiers clean the air of airborne pollutants which can trigger asthma attacks. A combination unit might be the way forward if your home is suffering from both low humidity and poor air quality.


Recap Of The Best Quietest Air Purifier

Coverage AreaWarrantyFilter replacementNoise Level
Blueair Blue Pure 411161 sq. ft.2 years6 to 8 months17-46 dB
Levoit LV-H132 H13 Air Purifier129 sq. ft.2 years6 to 8 months25-46 dB
Winix 5500-2 Air Purifier360 sq. f.t1 year12 months 28-45 dB
TaoTronics TT-AP001161 sq. ft.1.5 years3 to 6 months25-45 dB
Hathaspace Smart Air Purifier350 sq. ft.2 years4 months20-45 dB
Best Quietest Air Purifier

Wrapping it up

Of the 5 products we reviewed, the Blueair Blue Pure 411 Air Purifier was our favorite because we find that this air purifier has the best balance in terms of purification efficiency, safety, quietness and pricing. There are tons of awesome features that really make this air purifier shine. If you are looking to protect yourselves and your family from the harmful effects of allergies, this air purifier will get the job done for you. Priced reasonably as well, the Blueair Blue Pure 411 is a real steal for what it can do!

Click here to get one now!

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