HEPA Air Purifiers Do They Work?

What is air purifier?

If you split the words “air purifier” as “air” and “purifier”, you will then actually come to know that it is a tool or a device that purifies the air. This is an appliance that provides you with the cleaner air, using advanced technology.

Types of air purifier:

  • HEPA Air Purifiers
  • Electrostatic precipitators
  • Ultraviolet Light Air Purifiers
  • Activated Carbonated Purifiers

The best type of air purifier is the HEPA which is for High Efficiency Particulate Arresting also called high efficiency particulate absorber. This is the best type of air purifier, and a product labelled with HEPA, are considered highly efficient at capturing and blocking microscopic particles. HEPA air purifiers are especially helpful for the individuals who are suffering from allergies or asthma.

During World War II, HEPA air filters were invented by US government, to prevent radioactive particles, escaping from scientific and military labs. However, they have become an important and significant part of our daily lives. Filters that are standardized as HEPA, have many applications including their use in automobiles, medical facilities, aircraft, homes and are used in clean rooms for IC fabrication.

Features of HEPA Air Purifiers

Noise reduction feature

The double-walled housing efficiently lessens the sound transmission. Motor vibration from the air cleaner housing is systematically isolated by rubber suspension. These quiet air purifiers can be placed in most noise sensitive environments.

Captures 99% of airborne particles

The best and common feature of HEPA air purifiers is that it captures and blocks the 99% of airborne contaminants.


Every HEPA air purifiers are labelled with the specific warranty. Usually the warranty time is for 5 years. If you face any problem or fault with your air purifier during this time, you can get your product repaired, free of cost.

Auto-off timer

This feature is perfectly amazing as it allows you to set the time of the air purifier and enjoy a sound sleep without suffering from a tension of switching off the air purifier.

LED Touch Control Panel

With the LED touch control panel, you can easily adjust the settings of the air purifier according to your needs and requirements.


These HEPA air purifiers are customizable. You can have HEPA air purifiers with permanent or temporary replaceable filters according to your budget.

Filter Replacement Indicator

One of the most excellent features of HEPA air purifiers is the filter replacement indicator. This feature has evolved excellently since the invention of HEPA air purifiers.

Fan Speeds

Different fan speeds in different HEPA air purifiers are designed according to their working and specifications.


The most advantageous feature of HEPA air purifiers is their portability. They are designed in such a manner that one can easily carry from one place to another.

Why are air purifiers important?

In almost every part of world, pollution of air has become one of the serious issues and major concerns. Clean air is the basic necessity for all of us and it is not much available because of the consistent air contamination and debasement. Breathing or taking in dirty air puts you at great risk for allergies, lung cancer, asthma and other respiratory diseases. Tiny and small airborne particles can cause the much damage to individuals with asthma.

Due to this reason, air purifiers that are specifically designed to remove microscopic impurities and dross are ideal in curing asthma. A human body produces an allergy antibody in reaction to the pollen, dust or pet odor when they are inhaled. Also, the dander and pollen cause the air pathways to become more congested and this leads to snoring. There are many reasons which are responsible for the contribution in air pollution.

Not only taking preventive measures is important but the factor of protection is also important and necessary. So, some action is required against this filthy air. Air purifiers will help you to get a cleaner air. If you take in clean air with the aid of air, your exposure to toxic and dirt air would reduce to about 50%, putting in simple words, risk in reduction of diseases would be about 50%.

Pros and Cons of HEPA Air Purifiers


Clean the circulated air

Whether you are at home or at office, if you are armed with the HEPA air purifiers, you are quite protected against harmful particles which otherwise may lead to different respiratory diseases. HEPA air purifiers clean and purify the circulated air.

Level of efficiency

HEPA air purifiers have an excellent level of efficiency. They reduce the excess of 99.97% contaminants equal to or greater than 0.3 micrometers towards individuals.

Block the dust-sized particles

HEPA air purifiers completely block the entry of pollen, spores, mold, pet dander and dust mites.

Quickly cleans the air

HEPA air purifier is considered as the fastest and quickest air purifier that is the reason it is the best type of air purifier.

Low maintenance

One of the pros to HEPA air purifiers is that they their maintenance is very low. The repairing of these products are quite affordable.


Unable to eliminate bacteria and viruses

HEPA air purifiers cannot work on small particles like bacteria and viruses. As these particles are made up of DNA and are too small, HEPA air purifiers cannot block them.


Since HEPA filters are the most advanced technology which is being used in air purifiers, HEPA air purifiers are expensive type of products as compared to other air purifiers.

Unable to eliminate the odors

One of the major cons of a true HEPA air purifier is that it cannot eliminate and remove chemicals, odors, gases, fumes that are coming into your homes through windows and doors. Odors given off by the harmful particles like dust mites, molds and debris etc.

Volatile Organic Compounds

Airborne chemicals also include volatile organic compounds or VOCs. They originate from off-gassing of products which are placed in homes and other building materials.

5 Best HEPA Air Purifiers 2018

1. LEVOIT LV-PUR131 Air Purifier with True HEPA Filter

Price: $179.99

The fan of this purifier is much quieter than other products and it offers 2 year warranty. It has an LED that indicates air quality.

Main features:

  • Ideal for wildfire smoke and ashes; Good choice for allergy season

  • 3 Stage Filtration System: Pre-filter, TRUE HEPA Filter, & Activated Carbon Filter. It removes 99.97% of dust, pollen, smoke, odor, mold spores, and pet dander; filters particles as small as 0.3 microns and larger air pollution of PM 2.5. Good for stuffy nose

  • 100% ozone free, does not use UV or Ions which produce trace amounts of measurable ozone, a harmful air pollutant

  • Smart auto mode to indicate the surrounding air quality, automatically suggests fan speed to purify your air faster

  • Sleep mode sets the purifier to its lowest setting to produce fresh air as you soundly slumber without disturbing noise; set the auto-off timer and optional LED display to safeguard your respiration system while you sleep

  • Covers up to an average to large living room of 322 sq.ft (30 m²); CADR Rated 135+, refresh your air in 10 minutes

  • Energy Star-certified, CARB, FCC& CE-approved, this air purifier meets strict requirements and is considered to be energy-saving, eco-friendly and quality-assured

  • 1-year buyer assurance (with a free option to extend it by 1 more year) and lifetime support. On average, the filter should be replaced every 6 months and is available for purchase (Search for: LV-PUR131-RF); the air filter may need to be replaced sooner or later depending on the frequency of use and the air quality in your area.

2. Alen T500 Tower Air Purifier with HEPA-Pure Filter

Price: $159.00

This is an antibacterial HEPA air purifier and it is colored black. It has a silent fan and it delivers excellent in-class performance. Get this amazing product and make allergen-free and healthy environment for your family.

Main features:

  • PURE AIR FOR LIFE: We understand things happen, which is why Alen offers the industry’s first and only Lifetime Warranty

  • POWERFUL COVERAGE: T500 is perfect for bedrooms, offices, and other spaces up to 500 SqFt

  • INNOVATIVE DESIGN: Packs full-size performance into a sleek, compact tower with 12 designer panel options to fit seamlessly into your home, no matter your style

  • WHISPER QUIET: Provides a gentle and steady tone, so even when it’s working its hardest, you just might forget it’s there

3. LEVOIT LV-H132 Air Purifier with True HEPA Filter

Price: $89.99

Main features:

  • Ideal for wildfire smoke and ashes; Good choice for allergy season

  • 3 Stage Filtration System: Pre-filter, TRUE HEPA Filter, & Activated Carbon Filter. It removes 99.97% of dust, pollen, smoke, odor, mold spores, and pet dander; filters particles as small as 0.3 microns and larger and filters air pollution of PM 2.5

  • 100% ozone free, does not use UV or ions which produce trace amounts of measurable ozone, a harmful air pollutant

  • 3 Speed Settings (low, medium, and high) provide options for various conditions Quietly operates throughout the night, and has a gentle night light with two brightness settings Unique size and contemporary design makes it a perfect fit in smaller rooms or office spaces. The perfect gift for family, friends, and office mates

  • 1-year buyer assurance (with a free option to extend it by 1 more year) and lifetime support; CARB, ETL&FCC-approved. Note: please remove the plastic bag of the HEPA filter and charcoal filter before running the air purifier

  • On average, the filter should be replaced every 6 months and is available for purchase (Search for: LV-H132-RF); the air filter may need to be replaced sooner or later depending on the air quality in your area

4. GermGuardian AC5900WCA 3-in-1 Large Room Air Purifier

Price: $170.99

It’s a 3 in 1 product having UVC sanitizer, HEPA filter and large room air purifier. This is an ideal air purifier for asthma and allergy sufferers as it provides fresh and cleaner air by capturing 99.97% of allergens and dust.

Main features:

  • TRAPS ALLERGENS: HEPA Filter captures 99.97% of dust and allergens as small as .3 microns such as household dust, pet dander, mold spores and plant pollens.

  • REDUCES ODORS: Charcoal filter reduces common odors from pets, smoking and cooking.

  • FIGHTS GERMS: Optional UV-C light technology works with Titanium Dioxide to reduce airborne bacteria, viruses, germs and mold spores. Carb Compliant.

  • AHAM VERIFIED AND ENERGY STAR CERTIFIED: 21 inch 3 speed Hi-performance console is best used for rooms up to 338 Sq. feet. Filters and circulates room air over 4x per hour. The higher the CADR the faster the unit filters the air. CADR Dust (220), Pollen (215) and Smoke (218).

5. KOIOS Large Air Purifier with True HEPA Filter

Price: $154.95

This is a desktop air purifier for home and office use. It has a compact design. It has unique and fashionable shape. Small particles are absorbed by carbon filters and its best performance tends the customers to buy this product.

Main features:

  • 【3 STAGE FILTRATION SYSTEM】: Pre-filter, HEPA filter and activated carbon filter are used together to capture 99% of allergens and pollutants as small as 0.3 microns, including PM 2.5, dust, pet hair, pet dander, bacteria, pollens and odors; delivers clean, fresh air and reduces symptoms of allergies, asthma, hay fever;

  • 【SUITABLE FOR LARGE ROOM】: Covers an area up to 45 m² and delivers highest clean-air performance for your large living space, like your living room; Clean Air Delivery Rate Rated 340 m³/H;

  • 【MONITORS & PURIFIES AIR AUTOMATICALLY】: In Auto Mode, the purifier automatically monitors indoor air quality and changes fan speed accordingly; the purifier has an air quality indicator light displays 3 different colors (green, blue, red) to show the current level of air quality;

  • 【BREATHE EASIER, SLEEP BETTER, LIFE BETTER】: Choose Sleep Mode and let it help improve overall health of your family unnoticed while you’re asleep; in this mode, the air purity indicator light turns off and fan runs at a low speed with low noise so that you would not be distracted by the noise and light;

  • 【EASY TO OPERATE & 3 YEARS WARRANTY & CE APPROVED】: It has 4 timer (1/2/4/8 hours timer), 3 fan speeds level, 3 modes (Turbo Mode, Sleep Mode, Auto Mode) and Child Lock; also has a filter replace indicator to remind you when the active carbon filter needs to be changed; Built in Handle for easy moving around to any room. and clean air!


Term “HEPA” is actually one which you must look for when buying for an air purifier. Many companies attach this term to their products though they are not True HEPA. True HEPA are more expensive than non-HEPA air purifiers as true HEPA air purifier filter is the gold standard in the market. Choosing the best quality HEPA air purifiers is the investment that is of high quality. So, one must check all the features in the product before buying it because it is the matter of creating healthy environment at your home and office.

Reviewer: Agelina Smith

HEPA Air Purifiers Do They Work?

Review Date: