Why should you invest in an air purifier?

Toxic pollutants are a constant presence almost everywhere, whether it is the pollen in the garden, the toxic emissions in traffic, the cigarette smoke behind our office, and even the skin and fur of our beloved pets. An air purifier improves your air quality by eliminating these contaminants and other harmful particles which cause allergies, asthma, sinuses, and other respiratory infections. You can even set it in auto mode which automatically cleans the air whenever there is pollution for continuous protection.

Features to consider while choosing a quiet air purifier

These are the features that will help you identify the most suitable model for your budget, comfort, convenience, and air cleaning needs.

Noise level

Quietest Air Purifier

It is probably the most important feature to consider when looking for the quietest air purifier. It is also more likely the motivation that makes you seek quieter models like the ones on our list above or often among plug-in air purifiers. The noise in air purifiers is generated by the fans. That is why lowering the speed of the fan yields a quieter sound. Consider the decibels on the model and compare the number to common sounds with similar decibel to get an idea of its sound output.

Type of filters

Not all filters are created equal. Depending on the kind of pollutant you want to get rid of, you may need a filter that has been specifically designed and optimized to eliminate that particular pollutant since filters vary in their effectiveness in dealing with specific contaminants.
Quietest Air Purifier

Air purifiers solve this by having different types of filters and technology, such as PlasmaWave, to eliminate a wider range of pollutants. That is why most air purifiers use at least a washable pre-filter which traps large dust particles that could block the air purifier and affect the performance of the other filters; a HEPA filter which has an efficiency rate of 99.97 in removing particles that are at least 0.3 microns in size, particles that are mostly made of pathogens and allergens; and a carbon filter made of highly absorbent activated charcoal which is effective in removing odor, smoke and gaseous pollutants.

Some filters are washable and permanent; others require replacement after a certain period. Confirming the type of filter beforehand will help you anticipate the type of maintenance needed and any additional cost on the replacement.

Fan speeds

An air purifier with a variety of speed options is convenient because you can select a higher speed for high levels of pollution or for a shorter cleaning time, and a low speed setting to save energy and reduce noise. The Rabbit Air MinusA2 SPA-700A air purifier, for instance, has a whopping five speeds to choose from.

Coverage area

Air purifiers are designed to work at their optimal performance in spaces within specific dimensions. These dimensions are expressed in square or cubic footage, with the former being the most common.

Generally, large air purifiers cover more area than smaller ones, but it is best to check the specific coverage area of your intended model to be certain. Manufacturers indicate the particular space footage that their models are designed to cover so you can get the right air purifier for your intended room. As an example, Rabbit Air MinusA2 SPA-700A covers up to 700 square feet while Blue Pure 411 provides maximum square footage coverage of 161. Using the wrong model for your room may render it ineffective and expose you to harmful airborne particles.

CADR level

CADR is the short form of Clean Air Delivery Rate which is expressed in cubic feet per minute. It measures how many cubic feet of pollutants per minute an air purifier can remove in a room of a particular size. The pollutants measured by CADR are the three most common airborne particles; dust, pollen, and smoke.

CADR ratings are assigned to air purifiers after independent ANSI/AHAM AC-1 tests performed by the Association of Home Appliance Manufacturers (AHAM). The ratings are based on the end results, regardless of the method or technology used to filter the air.

Coway Airmega 400 has a CADR rating of 246 for dust, 240 for pollen and 233 for smoke, a proof of its efficiency and effectiveness in removing those particular pollutants.


The size of an air purifier affects its placement and, more often than not, the extensiveness of its coverage area. Models designed for spacious rooms or entire houses are larger to accommodate powerful motors and big filters that can process large amounts of air.

On the other hand, a small office or nursery will require a compact and portable air purifier to fit in the limited space. For more options in placement and storage, Hamilton Beach 04384 has a tower design which can be placed both vertically and horizontally while Rabbit Air MinusA2 SPA-700A comes with a wall mount kit to save space.


Our list of the best quiet air purifiers features models with a warranty period ranging from one to five years, a clear proof of how the warranty is specific to the individual air purifier. Consult with the seller, manufacturer and other buyers who have left feedback reviews online to know the period and terms of the warranty and how to avoid situations that could void it.

Extra featuresQuietest Air Purifier

  • Sensors: When you activate auto mode, the sensors keep tabs on the current quality of air and automatically start purification with the best speed setting as soon as they detect any pollution.
  • Timer: It saves energy by allowing you to set the air purifier to run for a certain period. The most common intervals are 1, 4, 8 and 12 hours.
  • Auto shut-off: It reduces power consumption by switching off the unit once optimal air purification has been achieved.
  • Speeds and operation modes: In addition to giving you greater flexibility in the level of output, multiple speeds can regulate the noise generated to a lower level. Some models feature various output modes which can be adjusted for different tasks and settings. For instance, Winix 5300-2 dims the LED light and reduces the fan speed for a quiet operation when in sleep mode, a mode also available in Rabbit Air MinusA2 SPA-700A. Coway Airmega 400 stops the fan once optimal air quality is achieved and switches to Eco mode to preserve energy.
  • Certification: Industry standards are used to ensure the air purifiers are effective, efficient, energy-saving and safe from toxic emissions. Winix 5300-2 is one of the quietest room air purifiers you can trust because it is cUL-listed and certified by AHAM, CARB and Energy Star.
  • Remote control: It is a convenient feature that allows you to operate the unit from a distance.
  • Performance and maintenance alerts: These include indicator lights which display the level of air quality and filter change reminders.

Tips to maintain your air purifier

  • Avoid placing the air purifier underneath and between furniture or against a wall which could limit the amount of air flow.
  • Clean the washable filters regularly and replace the other ones after the period recommended by the manufacturer to keep the air purifier in top performance.
  • Avoid opening the doors and windows or sweeping the room when your air purifier is running because it overworks the unit and decreases its lifespan.
  • Vacuum the room regularly, especially the carpet which easily holds dust and pet hair. It reduces the workload of your air purifier because it will then filter fewer particles.
  • Use low speed settings and Eco mode when you can because it uses less power and saves energy.