Clean Air Home Lab
Allergies

Best Air Purifiers for Allergies (2026)

Pollen, dust mite allergen, pet dander and mold spores are all particles, and a HEPA filter is made for particles. Here are five picks, compared on what each maker publishes, and the one number to size them by. An air purifier does not treat allergies, and this page is not medical advice.

Last updated: October 2026 · By the CleanAirHomeLab team

Quick Picks

  • HyperHEPA pick: IQAir HealthPro Plus, rated for 1,125 sq ft, 10-year limited warranty
  • Best overall: Coway Airmega 400, pollen CADR 400, 1,560 sq ft at 2 air changes an hour
  • Best for mid-size rooms: Levoit Core 600S, 391 CFM CADR with app control
  • Highest CADR here: Blueair 211i Max, pollen CADR 450, 674 sq ft at 4.8 air changes an hour
  • Longest filter life: Austin Air HealthMate, filter designed to last five years

The One Metric That Matters for Allergies

CADR matched to your room size. Pollen, dust mite allergen, pet dander and mold spores are all particles, and a HEPA filter is made for particles. The question is whether the purifier moves enough air for your room.

Shopping for pollen season? The spring allergy air purifier guide has a pollen calendar by region and picks listed by pollen CADR.

Have one main trigger? We also have guides to air purifiers for asthma triggers, air purifiers for pet dander, air purifiers for house dust and air purifiers for mold spores.

The CADR Rule

AHAM's rule of thumb: the CADR should be at least two-thirds of the room's floor area. The EPA sizing chart lists a minimum of 130 cfm for a 200 sq ft room and 195 cfm for 300 sq ft.

CADR 200

310 sq ft

Bedroom

CADR 300

465 sq ft

Living room

CADR 400

620 sq ft

Open floor plan

What HEPA Catches (and What It Doesn't)

AllergenKindDoes HEPA catch it?
PollenParticleYes, HEPA filters are made for particles
Dust mite allergenParticleYes, once it is in the air
Pet danderParticleYes, HEPA filters are made for particles
Mold sporesParticleYes, once they are in the air
SmokeParticles and gasesThe particles, yes

Our Allergy Picks

Editor approved

#1 HyperHEPA Pick

IQAir HealthPro Plus

$1199.99 list price

Why It's Great for Allergies

IQAir calls its particle filter HyperHEPA and rates the unit for 1,125 sq ft. IQAir publishes no AHAM CADR, so you cannot line it up against the others on CADR. It comes with a 10-year limited warranty.

Best for: Large rooms, when you want IQAir's filter and long warrantyFilter: No figure on file
Check current price on Amazon
Our top pick

#2 Best Overall

Coway Airmega 400

$649 list price

Why It's Great for Allergies

Coway lists CADR of 328 for smoke, 328 for dust and 400 for pollen, and rates the unit for 1,560 sq ft at two air changes an hour. The Max2 filter set combines activated carbon and True HEPA and lasts one year by Coway's schedule.

Best for: Living rooms and open floor plansFilter: One Max2 set a year
Check current price on Amazon
Editor approved

#3 Best for Mid-Size Rooms

Levoit Core 600S

$299.99 list price

Why It's Great for Allergies

Levoit lists a CADR of 391 CFM and rates the unit for 606 sq ft at 4.8 air changes an hour. Levoit lists it at 26 dB on its lowest setting. It has app control.

Best for: Bedrooms and mid-size roomsFilter: No figure on file
Check current price on Amazon
Editor approved

#4 Longest Filter Life

Austin Air HealthMate

$845 list price

Why It's Great for Allergies

Austin Air says the filter is designed to last five years. It pairs a HEPA filter with over 780 cubic inches of activated carbon and mineral media. Austin Air publishes no square-foot rating and no decibel figure.

Best for: People who want to change the filter once every five yearsFilter: One filter every 5 years
Check current price on Amazon
Editor approved

#5 Highest CADR in This Guide

Blueair Blue Pure 211i Max

$349.99 list price

Why It's Great for Allergies

Blueair lists CADR of 435 for smoke, 452 for dust and 450 for pollen, the highest numbers in this guide. It rates the unit for 674 sq ft at 4.8 air changes an hour and lists it at 23 dB on its lowest setting.

Best for: Big rooms where you want the most CADRFilter: $69.99 filter, up to 9 months
Check current price on Amazon

Common Questions

Do air purifiers help with allergies?+

They can take allergens out of the air that passes through the filter. The EPA says portable air cleaners can reduce indoor air pollution but cannot remove all pollutants. An air purifier does not treat allergies. For your symptoms, talk to your doctor.

What is the best air purifier for pollen?+

Pollen is a particle, and a HEPA filter is made for particles. So pick by size, not by special features. Match the pollen CADR to your room and keep windows closed on high pollen days.

What about pet dander?+

Pet dander is a particle, and a HEPA filter is made for particles. For a home where someone has asthma, the EPA says to use an air cleaner with a HEPA filter and to keep the pet out of that person's bedroom. For smells you need activated carbon as well. See our guide to air purifiers for pets.

How big a purifier do I need?+

AHAM's rule of thumb is a CADR of at least two-thirds of the room's floor area. The EPA sizing chart lists a minimum of 130 cfm for 200 sq ft and 195 cfm for 300 sq ft, with an 8-foot ceiling.

Sources and last review

Specifications on this page are taken from the documents below, on the dates shown. We do not physically test products; read our methodology. Page last reviewed .