Indoor air quality can greatly impact allergy and asthma symptoms. Air purifiers are an effective solution, filtering out the pollutants and allergens that trigger these conditions. When selecting an air purifier for allergies and asthma, key factors to consider are the type of filter, coverage area, and smart Features.

Causes of Allergies and Asthma Symptoms

Allergies and asthma are often worsened by exposure to indoor air pollutants like:

  • Dust mites – Microscopic bugs and their waste. A common allergen found in bedding, carpets, and stuffed furniture.
  • Mold – A type of fungi that grows in damp areas. Mold spores float through the air and can trigger allergic reactions.
  • Pet dander – Tiny skin flakes shed by cats, dogs, birds, and other furry pets.
  • Chemicals & odors – From cleaners, air fresheners, paints, or fragrances. These volatile organic compounds (VOCs) can irritate airways.

Air purifiers improve air quality by capturing these pollutants before they are inhaled. This alleviates allergy symptoms like sneezing, watery eyes, coughing, and skin irritation. And for those with asthma, less exposure to triggers means fewer flare-ups and asthma attacks.

Choosing the Best Air Purifiers for Allergies and Asthma

There are several key factors to consider when selecting an air purifier tailored to allergy and asthma relief:

Type of Filter

The filter type determines what sized particles the air purifier can effectively remove.

  • HEPA filters are considered the gold standard for trapping pollutants like dust, dander, mold, and smoke that worsen allergies and asthma. True HEPA filters capture over 99.97% of particles as small as 0.3 microns. This includes most common allergens.
  • Activated carbon filters adsorb gases, odors, and smoke. Look for carbon filters made from highly porous coconut shell carbon for best results. Activated carbon pairs well with HEPA filters to trap solid particles and gaseous pollutants.
  • Other filter materials like antimicrobial treatments help reduce bacteria and viruses. And pre-filters extend the life of HEPA and carbon filters by catching larger particles first.

Coverage Capacity

Consider room size and layout when selecting an air purifier. Check each model’s recommended coverage area against the actual square footage you need to purify.

Portable air purifiers work well for single rooms under 200 square feet. For larger spaces, look for built-in air purifiers designed to clean the whole home.

Also, account for open concept spaces or multi-story airflow when calculating total area. Your HVAC contractor can help determine the right capacity air purifier.

Smart Features

Advanced sensors and settings allow air purifiers to automatically adapt to changes in air quality:

  • Air quality sensors detect rising pollution levels. The air purifier then adjusts fan speeds accordingly to maintain cleaner air.
  • Auto mode lets the air purifier self-regulate based on indoor air quality readings from built-in sensors. This ensures it runs as needed without wasting energy.
  • Scheduling allows programming the device to power on/off at set times. Helpful for running it more at night or when residents are home.
  • Multiple fan speeds let users manually control airflow when needed. Faster speeds provide quicker air purification.

These smart Features optimize air cleaning while minimizing energy costs. They also reduce noise levels by only running the fan as fast as necessary.

The Best Air Purifiers for Allergy and Asthma Relief

With those key factors covered, here are our top picks for the best air purifiers for allergies and asthma:

Best Overall: Austin Air HealthMate HM400

The Austin Air HealthMate provides medical-grade air purification. Its true HEPA filter plus activated carbon filter remove 99.97% of allergens, chemicals, and odors. An optional antimicrobial treatment prevents mold and bacteria growth. It covers up to 1,500 square feet, making it a great whole home solution.

Best Smart Air Purifier: Coway Airmega 400S

Coway’s Airmega intelligent air purifiers combine HEPA filtration with smart Features. Air quality sensors detect and auto-adjust to pollution levels. The Airmega 400S model covers rooms up to 1,560 square feet. It also offers app and voice control through Alexa and Google Assistant.

Best Built-In Model: Aprilaire Whole Home Air Purifier 2200

Integrated directly into the return air ducts, this built-in air purifier cleans the whole home. Its hospital-grade HEPA filter has an extremely low pressure drop, meaning it won’t strain your HVAC system. The compact design is easy to install and service. Aprilaire systems are used in over 7 million homes.

Most Affordable: Germ Guardian AC4825

With HEPA and charcoal filtration plus UV-C light sanitation, the GermGuardian AC4825 eliminates allergens and kills airborne germs. Its compact size makes it perfect for rooms up to 167 square feet. An affordable option for allergy and asthma relief on a budget.

Creating a Healthy Home Environment

Using an air purifier tailored to your needs helps control allergy and asthma triggers. This promotes better breathing, fewer symptoms, and an overall healthier indoor environment. Be sure to also follow additional asthma management guidelines from medical professionals. With a multi-pronged approach, you can effectively minimize attacks and medication usage.


What is the best type of filter for an air purifier to help with allergies and asthma?

HEPA filters are considered the gold standard when it comes to trapping allergens and pollutants that can trigger respiratory issues. These specialized filters are capable of capturing 99.97% of particles as small as 0.3 microns, including pollen, dust mites, pet dander, and mold spores, which are some of the most common triggers for allergies and asthma.

Can air purifiers remove pet hair from my home?

While air purifiers can help reduce airborne irritants such as pet dander or pollen that cause allergies and asthma symptoms by filtering out tiny airborne particles in your home’s air supply- they may not be effective at capturing larger debris like hair or fur.

How often do I need to replace the filter on my allergy/asthma air purifier?

The frequency with which you should replace your allergy/asthma air purifier’s filter depends on a variety of factors such as usage level, model specifications, size/type of household etc., but generally speaking HEPA-type filters should be changed every six months at minimum for optimal performance. However it is always advisable to refer specific instructions provided by manufactures for your particular model.


Hey there, I'm Kevin, editor of Xievo. I'm passionate about air purifiers and providing accurate information to help readers make informed decisions. In my free time, I love hiking and experimenting with air purifiers in my own home. Thanks for visiting Xievo!