Best Quiet Air Purifier 2021

Your home is your everything – a center of refuge, meditation studio, resting place, workplace, playground, and dine-in restaurant. It is the one place you spend lots of time in. 

But few homeowners realize that cleaning their homes isn’t always about washing and vacuuming. A healthier home is one that has cleaner air. Often, the air pollution in your indoor environment is caused by things like dust, pollen, or smoke, to mention a few.

A quiet air purifier will get the job done by making the air free from harmful toxins while still maintaining the lowest noise levels possible. And so, you can use this gadget in your soundproofed room and enjoy a peaceful night’s sleep and comfortable working environment.

Below are the top 7 best quiet air purifiers that make a wise investment!

Best Quiet Air Purifiers Comparison Table

Room coverage
Noise LevelWeight
RabbitAir MinusA2280 Sq. Ft20.8 - 45.6 dBA24.2 pounds
Germ Guardian True HEPA Filter153 Sq. Ft45.0 dBA8.6 pounds
Okaysou AirMax8L500 Sq. Ft22dB13.07 pounds
Dyson Pure Hot300 Sq. Ft 57 dB5.8 pounds
Hamilton Beach TrueAir Air Purifier140 Sq. FtQuiet6.3 pounds
Rabbit Air BioGS 2.0550 Sq. Ft22.8 - 48.6 dB16.8 pounds
Alen BreatheSmart 45i Air Purifier800 Sq. Ft39 dB23 Pounds

Top 7 Best Quiet Air Purifiers

1) RabbitAir MinusA2 Ultra Quiet Air Purifier

Key Features

  • Advanced HEPA filtration; 6 stages
  • 5-year warranty
  • Odor remover customized filter
  • Room coverage up to 700 sq. ft.
  • Runs on 20.8 dB low noise

The RabbitAir MinusA2 is designed with advanced HEPA filtration technology and operates on 6-stages of deodorization and purification.

The unit runs on 20.8 dB low noise, giving you a quiet and peaceful work environment. Additionally, the low noise operation and energy-efficient DC motor make the purifier suitable for medium to large bedrooms. 

Even at its highest speed setting, this purifier will still run quietly, and the activated carbon filter will eliminate indoor pollution silently in higher fan speed settings.

It is adaptable and can either stand alone or mount on your wall, giving you the freedom to set it according to your specifications.

When the purifier is in a dark room, the light sensor automatically transitions it to sleep mode. The sensor resumes an active mode when the light levels increase. This feature ensures low energy consumption.

The purifier has two variants based on coverage; the SPA-700A is for a 700 sq. ft square feet room, whereas the SPA-780A variant can clean approximately 815 sq. ft with two air changes per hour. 

Another great thing about this unit is that it has four flexible filter options. You can choose what best suits your needs. With the filters lasting up to two years with 12-hour daily operation, and a 5-year warranty, the purifier is sure to give you long-term service. 


  • Low noise profile
  • True HEPA filter technology
  • Sleep mode, auto mode
  • Ideal for large rooms filtration
  • Activated carbon filter to trap gas and odor 


  • Slightly expensive

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2) Germ Guardian True HEPA Filter Air Purifier

Key Features

  • True HEPA air filter
  • Bulb wattage is 55 watts
  • Medium to large rooms up to 153 square feet
  • 3-speed settings
  • Optional UV c light

Dust often accumulates on TVs, shelves, walls, sofas, and many other surfaces in our homes! If you’re the type who dusts the house often, you can save your cleaning time using the Germ Guardian air purifier!

This unit employs the True HEPA air filter to kill 99.97% of germs, pollen, dust, mold spores, and pet dander from the air. With the UV-C light, the product will eliminate allergens as tiny as 0.3 microns and kill airborne viruses like rhinovirus, influenza, and staph. 

The activated charcoal filter will help you reduce any unwanted odors from smoke, pets, and cooking fumes. You don’t need to worry about the filter emitting toxic substances into the air; it applies Titanium Dioxide that reduces harmful and volatile organic compounds.

You can use the lowest setting for a gentle white noise at night. The low noise profile will guarantee you a quiet and restful sleep. 

This 22’’ purifier will filter the air in medium to large rooms of up to 153 square feet 4-times per hour at maximum speed. It comes with a CADR RATING of pollen (125), dust (118), and smoke (99). 

And you can choose between the 3-speed settings with the ultra-quiet mode on the lowest speed setting. Your needs will determine the speed setting to choose.

The 3-year warranty from GermGuardian gives you the product’s reassurance.


  • Affordable
  • It works well in enclosed areas
  • Lightweight and portable 
  • Super-quiet operation
  • It cuts off unwanted odors pretty well


  • It can catch fire

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3) Okaysou AirMax8L Air Purifier

Key Features

  • Medical Grade ULTRA-DUO Filtration System
  • Advanced turbine motor
  • Child-lock and auto shut-off protection
  • Sleep mode
  • Filter replacement indicator

Okaysou AirMax8L is the ideal pick for houses with pets. It combines 2-stage duo filtration and washable 3-stage ultrafiltration to capture pet hair and pet dander that can cause breathing complications. 

At 210 CADR, AirMax8L circulates air up to 1.5X per hour in a room size of 800 square feet or 3X per hour in a 500 square feet room. It is often used in small to large rooms, bedrooms, living rooms, basements, or kitchens.

The advanced turbine motor has 45 vanes, a large air inlet area, and a creative internal structure that effectively removes stubborn odors, pet hair, wildfire, and smoke in your home. It also relieves any unpleasant symptoms like congestion, runny nose, sneezing, or shortness of breath.

The unit produces a natural airflow with no ionizers, and it uses the true HEPA filtration to capture up to 99.97% of 0.25 microns airborne particles. With their UV-C lights, the purifier ensures you enjoy 100% ozone-free air. 

It operates on noise levels of 28dB at the lowest fan speed, making them comfortable to use during the night as you sleep. And since it has a sleep mode, child lock feature, and a low noise profile, the air purifier is suitable for use in the kids’ room.

The 5-year warranty, lifetime US-based customer support, and CARB certification help maintain the purifier’s optimum purification performance. 

All considered, the Okaysou AirMax8L Air Purifier is an affordable pick recommended for pet homeowners whose primary concern is eliminating the odour in their home. 


  • Quiet in the lowest speed
  • Suitable for small to large rooms
  • Value for money product
  • Delivers 100% ozone-free air
  • 5-year warranty


  • Smaller than other brands

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4) Dyson Pure Hot + Cool, HP01 HEPA Air Purifier

Key Features

  • Sleep timer
  • Ten-speed setting
  • Automatic shut off feature
  • 350° of oscillation and powerful motor
  • Air Multiplier technology

Fourth on our list of the best quiet air purifier runs a bit expensive, but it’s a unique air purifier that works perfectly well and offers excellent value for money. 

Dyson technology is scientifically proven to capture particles as small as bacteria and allergens. Additionally, the sealed HEPA filter captures 99.97% of allergens as little as 0.3 microns, making it an ideal air purifier for pets, allergies, dust, mold spores, and pollen. 

The multi-functional nature of the purifier works well without compromise. With an Air Multiplier technology, the unit delivers over 53 gallons/second of smooth yet powerful airflow. 

It gives 350° oscillation, which directs airflow where you need fresh air. It can be used for long-range personal heating or fast room heating. It automatically detects airborne particles and gases, then diagnoses and reports them in real-time. 

The unit amplifies the surrounding air, giving an uninterrupted stream of purified airflow. The night-time mode will monitor and purify their air in the quietest settings. When tipped over, the purifier automatically shuts off. 

Since the quiet air purifier has asthma and allergy-friendly certification and a Quiet Mark accreditation, you can trust it for silent purification.

Other bonus features in this quiet air purifier include a sleep timer and ten airspeed settings. 


  • Multi-functional
  • Captures 99.97% of allergens
  • Excellent value for money
  • Smooth oscillation
  • Super quiet performance


  • Expensive

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5) Hamilton Beach TrueAir Allergen

Key Features

  • Two replaceable carbon zeolite filters
  • Three speeds
  • Permanent HEPA-grade filter
  • Ultra-quiet operation
  • Effective implementation for 140 square foot rooms

Several users describe the Hamilton Beach TrueAir Allergen air purifier using the word “economical.” It is affordable yet comes with quality performance. 

Another unique feature that attracts most users is the permanent filter that stays intact and perfectly functional, which means you don’t need to replace the filter, saving you more costs. Vacuum the filter at least once a month for optimum performance. 

The permanent HEPA filter works hand-in-hand with the two replaceable carbon zeolite filters to pre-filter for pet hair and larger particles. The filters also capture 99.97% of dust, pet dander, pollen, dust mites, and mold or mildew spores to as small as 3 microns from the air.

The ultra-quiet fan and motor hardly produce noise. The 3-speed settings give you ultimate control. You can set it on a high setting for faster air cleaning, the medium setting for all-day use, and the low setting when extra quiet operation is needed. You can rest assured of a peaceful night’s sleep. 

The Hamilton Beach TrueAir Allergen offers versatile air care that fits anywhere. You can position it horizontally or vertically to best suit your hallway, living room, bedroom at home up to 140 square feet.

All in all, you can go for this unit if you’re looking for something compact, affordable, and quiet.


  • It saves you money and time
  • Three speeds for ultimate control
  • Easy to clean
  • Quiet and powerful
  • High performance


  • Only suitable for smaller rooms

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6) RabbitAir BioGS 2.0 Air Purifier

Key Features

  • 5-speed settings
  • Noise levels of 22.8 – 48.6 dBA
  • 4-stage deodorization and purification
  • True HEPA filter (BioGS HEPA)
  • Built-in air monitor

The RabbitAir BioGS 2.0 Air Purifier filters the air with 4-stages of deodorization and purification. It also has a 5-speed variation that helps you set the purifier to a setting that meets your specifications. 

The noise level of the air purifier ranges between 22.8 – 48.6 dB, allowing you and your family members to enjoy silent air filtration. You can comfortably set the product in your room and enjoy a quality night’s sleep while filtering the air.

The unit has two base variants; the SPA-550A can clean the air in a 550 sq. ft, whereas the SPA-625A cleans a 625 sq. ft room with two air changes per hour at high speed. The larger variant comes with two design options and an integrated air quality monitor.

The rated power is only 29 watts, and so you can use it all day long without getting worried about your energy bills.

The filters are built with quality materials and will last for 3-4 years, depending on use. Fortunately, the purifier has a filter life indicator that tells you when to replace the filters.

Go for the RabbitAir BioGS 2.0 Air Purifier if your primary concern is allergens and not odour removal! 


  • Low noise profile
  • Optional negative ion generator
  • Permanent pre-filter that doesn’t need regular replacement
  • Prolonged optimal filter efficiency
  • Aesthetical beautiful and well-made design


  • In a high setting, it can be breezy

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7) Alen BreatheSmart 45i Air Purifier

Key Features

  • CADR Rating of 245
  • Filter life indicator
  • 4 Fan speed settings
  • Three-time settings 
  • 800 square feet room coverage

The Alen BreatheSmart air purifier is perfect for large houses with the capability of cleaning up to 800 sq. ft of rooms every 30 minutes. This feature makes it perfect for kitchens, hallways, and bedrooms. 

Its lights-off mode and child lock feature make it an ideal pick for your child’s bedroom. It is available in 7 color options for the face-plate, enabling you to choose what fits your child’s existing decor.

Unlike most quiet air purifiers, this gadget comes with a space-saving solution. Its footprint is relatively small, with a height of only 2 feet and a width of 15 inches. 

Noise levels are kept at a minimum with the help of WhisperMax technology. The tech operates at low noise levels of 39-56 dB while using a bulb wattage of 50W at its highest speed setting. 

The Alen BreatheSmart 45i Air Purifier also features the True HEPA filter that captures 99.97% of airborne particles up to 0.3 microns. The additional carbon pre-filter helps to capture household chemicals, smoke, mold, volatile organic compounds, and more. 

The main filter will last you 9-12 months, while the pre-filter needs regular vacuuming to improve its performance and extend its service life.


  • Ability to turn the ionizer off or on
  • Minimum electricity use
  • Low Energy Consumption 
  • Ideal for medium, large, and extra large-sized rooms
  • Modern style and designer color options


  • Costlier

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Best Quiet Air Purifier Buying  Guide

Factors to Consider when Buying the Best Quiet Air Purifier

  • Filtration system

The HEPA filter technology is the most commonly used type of filter. It is effective and cleans up to 99.97% of harmful pollutants such as pollen, animal dander, mold spores, and dust particles from the air. HEPA filters will also capture airborne allergens sizes down to 0.3 microns. Only be sure that it is the true HEPA and not HEPA-like or the HEPA-type.

If you’re looking to rid odor, consider a unit featuring an activated carbon filter as it can eliminate smells like smoke. Purifiers with antibacterial coating on the filter will always keep your environment free from bacteria and germs. 

  • Noise Levels

If you’re a light sleeper or the type who doesn’t love noisier environments, you shouldn’t ignore the noise levels of the air purifiers. The ideal noise level of quiet air purifiers is 35 decibels. A unit with noise levels above 55 decibels can be disturbing. 

Besides the levels, you should also go for units with an ultra-quiet sleep mode since this feature will reduce the noise levels when you want to sleep.

The CADR of a purifier refers to how quickly and effectively the gadget can work. It measures the cubic feet per minute that the air purifier filter can clean out pollen, smoke, or dust. That means the size of your room will determine the CADR rating of the purifier.

If you’re planning to purify a larger space, it’s advisable to go for air purifiers with higher CADR ratings. If your unit has a smaller CADR rating, it may not be adequate to cover a larger space. And so, be sure to check the rating before purchasing the purifier.

  • Convenience

While manual air purifiers are more affordable, automatic air purifiers will surprise you with their efficiency levels. Most of these modern purifiers come with smart sensors that adjust the fan speeds according to your preferred air quality.

Another convenience that comes with higher-end units is having alerts like LED lights or beeps. These alerts communicate when it is time to replace filters, ensuring the purifier works well throughout its service life.

Our Top Pick

When it comes to purifying your indoor environment at the quietest noise levels, the RabbitAir MinusA2 Ultra Quiet Air Purifier does a better job than its contenders. Though this unit is costlier, its higher-end features and quality performance give you value for money. 

Investing in this quiet gadget is one of the best decisions you could ever make. It eliminates allergens and reduces unwanted pollutants in the air, keeping you and your family comfortable. There’s never been a better way of purifying the air in your environment!

All the best in your purchase!

Frequently Asked Questions (FAQs)

Q: Are all air purifiers noisy?

A: Manufacturers have designed the noise levels of modern air purifiers to be as low as possible while running. The noise levels differ from one air purifier to another. Air purifiers with noise levels lower than 35 dBs produce shallow sounds, while more than 50dBs are noisier.

Q: Why is my new air purifier loud?

A: Air purifiers are designed to clean particles like dust, pet dander, mold, and allergens by passing the air through a filter. When your new air purifier begins making loud sounds, chances are, the filter is full of dust. Check your filter and replace it to stop the noise.

Q: Are HEPA filters noisy?

A: When you buy an air purifier with a HEPA filter, you’ll enjoy quality filtration by capturing up to 99.97% of up to 0.25 microns airborne particles. Such purifiers operate on noise levels of 28dB at the lowest fan speed, making them comfortable to use during the night. 

Q: What are the side effects of using an air purifier in my room?

A: Specific side effects may include coughing, throat irritation, chest pains, or shortness of breath. Some come with increased risks of respiratory complications. It’s advisable to go for ozone air purifiers made with ion generators that produce 100% clean air.

Q: What is an acceptable level of noise in decibels?

A: Sound is measured in decibels (dB). A safe and acceptable noise level for air purifiers is 40 decibels or below. You can suffer from hearing complications when your ears are exposed to constant background noise above 50 dB. For reference, regular breathing is about 10 dB, a whisper leaves 20 dB, and conversations at home are around 50 dB. 

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