Air Purifier Buying Guide

Air Purifiers America provides a wide selection of units and brands, each made to fit a variety of needs. Our Buying Guide is here to teach you what to consider when choosing an air purifier and what might work best to improve your indoor air quality. Use the following information to learn more about different air purifier brands, technologies and features.

What Type?

There are three mains types of air purifer: HEPA, electrostatic precipitator and ozone generator. Among these common air purifier types, only one truly works. After years of testing and collecting thousands of customer reviews, we only recommend high efficiency HEPA air purifiers (High Efficiency Particulate Air)—the safest and most effective air purification technology.

  Type Brands Description Effectiveness Recommended
HEPA
(High-Efficiency Particulate Air)
  • Alen
  • Austin Air
  • Blueair
  • AllerAir
High efficiency HEPA air purifiers effectively capture airborne particles. The percent of particles captured is the highest of any air purification technology available. HIGH
Removes up to 99.97% of particles like dust, pollen, pet dander, mold spores and more.
YES
Electrostatic Precipitator
  • Ionic Breeze
  • Oreck
  • Pur Ion Pro by Brookstone
  • Therapure
Particles are charged and then stick to oppositely charged metal plates within the air purifier. MINIMAL
Does a poor job at circulating air. Requires frequent cleaning of the plates to maintain efficiency.
NO
Ozone Generator
  • Alpine Air
  • Biozone
  • EdenPure
  • Better Living
Not safe and effective at removing pollutants. By design, they produce ozone, a lung irritant that can cause adverse health effects. HARMFUL
Does not remove particles in the air. Ozone worsens air quality and can cause damage to lungs when inhaled.
NO

Complementary Technology

In addition to HEPA air purifier technology, there are complementary air purifier and filter technologies that can be used to effectively eliminate odors, bacteria, viruses, VOCs, and chemicals in your air.

  Type Description Target Contaminants
Activated Carbon Effective at removing unpleasant odors, gases, and chemicals in the air. Particles become attracted to, and then trapped within tiny pores in the activated carbon.
  • Odor
  • Gases
  • Chemicals
UV Light Kills airborne germs, bacteria and viruses by damaging the bacteria and viruses' DNA & molecular structure.
  • Bacteria
  • Viruses
Silver Ion Microbial Prevention Filter Silver-infused filters capture and kill airborne microbes. Silver is a natural anti-bacterial.
  • Microbes
  • Bacteria
  • Viruses
Ionizer Helps remove pollen, bacteria, odors, and chemicals in the air. An ionic-only unit provides inadequate filtration. Ionizers are added to HEPA units to improve their performance but should not be used as the sole method of filtration.
  • Pollen
  • Bacteria
  • Odor
  • Chemicals
Photo-Catalytic Oxidation (PCO) Destroys gaseous pollutants by converting them into harmless products by the use of UV light and a catalyst (Titanium Oxide).
  • Gases
Pre-Filter Captures large particles (hair, large dust particles) to extend the life of your air purifier filter.
  • Hair
  • Pet Fur
  • Large dust particles
Molecular Conversion Powder Destroys tough odors like tobacco smoke at a molecular level, leaving the air smelling fresh and pure.
  • Smoke
  • Heavy Odor
Thermodynamic Sterilizing System (TSS) Destroys 99.9% of living microorganisms and proteins by exposing them to temperatures above 200 C (approx. 400F). Not available in conjunction with HEPA filtration.
  • Bacteria
  • Viruses
  • Mold

Concern

Which air purifier is best for your home environment? Use our quick guide to make the best decision. All air purifiers recommended cover basic allergy and asthma concerns an are the best rated in each category.

  Concern Target What to Look For Shop
Allergies
  • Pollen
  • Dust
  • Mold
  • Pet Dander
  • HEPA or HEPA-Type
  • Pre-Filter
  • Ionizer
All Air Purifiers for Allergies
Asthma
  • Pollen
  • Dust
  • Mold
  • Pet Dander
  • Smoke
  • HEPA or HEPA-Type
  • Pre-Filter
  • Ionizer
  • Activated Carbon
All Air Purifiers for Asthma
Dust
  • Dust Mites
  • Pet Dander
  • Insect Parts
  • Food Bits
  • Lint
  • Pollen
  • Mold
  • HEPA or HEPA-Type
  • Pre-Filter
  • Ionizer
  • Activated Carbon
All Air Purifiers for Dust
Household Chemicals
  • Pollutants from cleaning supplies
  • Paint fumes
  • Adhesive fumes
  • HEPA or HEPA-Type
  • Pre-Filter
  • Ionizer
  • Activated Carbon
All Air Purifiers for Chemicals
Microbes
  • Bacteria
  • Viruses
  • Flu/Cold
  • Dust Mites
  • HEPA or HEPA-Type
  • Pre-Filter
  • Ionizer
  • UV Light
  • Silver Ion
  • TSS
All Air Purifiers for Microbes
Mold
  • Mold Spores
  • Bacteria
  • Viruses
  • HEPA or HEPA-Type
  • Pre-Filter
  • Ionizer
  • UV Light
  • Silver Ion
  • TSS
All Air Purifiers for Mold
Odor
  • Smoke Odor
  • Kitchen Odor
  • Pet Odor
  • HEPA or HEPA-Type
  • Pre-Filter
  • Ionizer
  • Activated Carbon
  • Molecular Conversion Powder
All Air Purifiers for Odor
Pets
  • Pet Dander
  • Pet Hair
  • Pet Odor
  • HEPA or HEPA-Type
  • Pre-Filter
  • Ionizer
  • Activated Carbon
  • Molecular Conversion Powder
All Air Purifiers for Pets
Smoke
  • Secondhand Smoke
  • Smoke from Cigars & Cigarettes
  • Smoke Odor
  • HEPA or HEPA-Type
  • Pre-Filter
  • Ionizer
  • Activated Carbon
  • Molecular Conversion Powder
All Air Purifiers for Smoke

Coverage Area & Efficiency

Coverage Area

Coverage areas are related to the air purifier's air exchange frequency. In other words, the amount of air that passes through the air purifier, or how much it cleans within a specified coverage area. We suggest comparing the room in your home to the average room size provided below. For optimum air exchanges, consider an air purifier that covers a larger square footage area than your room size.

Average Room Sizes

Open Floor Plan 1000+ sq. ft.
Connected Living/Dining Room 300-600 sq. ft.
Living Room 150-200 sq. ft.
Master Bedroom 150-200 sq. ft.
Small Bedroom 100 sq. ft.
Bathroom 80 sq. ft.

Particles Removed

Air purifiers may reduce the amount of airborne pollutants and allergens within its coverage area, improving your indoor air quality. The amount of airborne pollutants removed by an air purifier differs, based on the specifications of the particular unit.

Style

Depending on your needs, some prefer different styles of air purifiers for their home. Air Purifiers America provides four different body styles, read to learn which may work for you.

tower air purifier in air-purifiers-america.com buying guide

Tower

Tower air purifiers are generally for those who prefer a modern, stylish look in their home. Tower air purifiers featured on Air Purifiers America include: Alen Paralda, Alen T500, Honeywell HHT-080 and Honeywell HFD-120-Q.

drum air purifier in air-purifiers-america.com buying guide

Drum

Drum air purifiers are typically for those with concerns related to chemical or strong odors. Drum air purifiers featured on Air Purifiers America include: AllerAir 5000 Exec, AllerAir 6000 Exec.

box air purifier in air-purifiers-america.com buying guide

Box

Box air purifiers usually provide larger coverage areas and are for more open spaces. Box air purifiers featured on Air Purifiers America include: Alen BreatheSmart, Alen A350, Blueair 403 and Austin Air Allergy Machine.

compact air purifier in air-purifiers-america.com buying guide

Compact

Compact air purifiers are for small smaller spaces where air quality may be an issue. Compact air purifiers featured on Air Purifiers America include: Alen T100.

Features

Air Quality Sensor and Automatic Speed Adjustment

Air purifiers with sensors automatically adjust their airflow based on the amount of pollutants detected in the air. They automatically turn themselves up or down, depending on the amount of cleaning needed.

Remote

Air purifiers with a remote allow you to adjust the unit's setting from any space in your home, providing convenience and fresh air all at the same time.

Volume and Noise Quality

The amount of noise created by an air purifier may impact where you place your unit, or how often you use it. The noise levels of our air purifiers generally range from as quiet as a whisper to a box fan on high. We suggest considering noise levels as you shop for an air purifier, as it may impact your use.

Timer

Having an air purifier with a timer allows you to program when your unit runs. This gives you the freedom to turn off your unit when you know you will not be home, or have the unit running on high while you sleep.

Filter Replacements

Availability

Air Purifiers America provides filters for every unit we sell, making our filter options readily available. We also offer AutoDelivery, an automatic filter replacement program where you receive your filters on a schedule. Learn more

Cost

Filter replacement costs can vary with different air purifier brands. The key features to consider when comparing filter prices are filter efficiency and filter types available.

Filter Options

Different brands provide filters based on concern and the air purifiers themselves. Some brands, like Alen, provide a variety of filter options, while other brands, like AllerAir or AustinAir, provide only one filter that address specific concerns.

Frequency

Replacing your filter is essential to keeping your air purifier running effectively. Depending on your usage and needs, most brands require filter changes every 6-12 months. However, some air purifiers require filter changes every 2-5 years, typically these are for more severe concerns, like chemical sensitivities. Understanding which air purifier filter is best for you depends on your specific needs. Learn more about Air Purifier Replacement Filter options

Energy Efficiency

energy star savings on air purifiers

Energy Star Savings

When run continuously, a standard air purifier may use 550 kWh per year in electricity. Energy Star Certified Air Purifiers are 40 percent more energy-efficient than standard models. According to the EPA, this can add up to almost $200 over the air purifier’s lifetime. Air Purifiers America carries several brands with Energy Star Certified Air Purifiers, including Alen and Blueair.

Warranty & Service

Warranty

Warranty varies by brand. Most brands come with a one year warranty, but select brands offer as much as a limited lifetime warranty.
Compare Brand Warranties

Customer Service

Air Purifiers America has a dedicated air quality specialist to help with any questions, simply call 800-334-1494.
Contact Us

Guarantee

When you buy any product on Air Purifiers America, you can return it within 30 days of receipt for a no hassle refund. Just fill out our easy 1-Step Return Process; we do everything else. It's that simple!
The Air Purifiers America Guarantee

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