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Mould

Best Air Purifiers for Mold (2026)

A purifier catches mold spores in the air. It does not stop mold growth. You need both the right filter and the right humidity control. Here is the full picture.

Before you buy a purifier

If you have visible mold, remove it and fix the moisture source first. An air purifier running next to an active mold colony is like mopping the floor while the tap is still running. The purifier helps with airborne spores, it does not solve the problem.

Top Picks for Mold

HyperHEPA Pick

IQAir HealthPro Plus

$1199.99 list price

IQAir calls its particle filter HyperHEPA and rates the unit for 1,125 sq ft. Mold spores in the air are particles, and that is what a HEPA filter is made for. IQAir publishes no AHAM CADR, so you cannot compare it on CADR. It has a 10-year limited warranty.

Best for: Large rooms, when you want IQAir's filter and long warrantyFilter: No figure on file
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Best Overall for Large Spaces

Coway Airmega 400

$649 list price

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. Coway lists it at 22 dB(A) on its lowest setting.

Best for: Basements, large living areas and open floor plansFilter: One Max2 set a year
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Longest Filter Life

Austin Air HealthMate

$845 list price

Austin Air says the filter is designed to last five years, so you can run the unit all the time without a filter change in the middle of a clean-up. It pairs a HEPA filter with over 780 cubic inches of activated carbon and mineral media.

Best for: Homes that run a purifier all yearFilter: One filter every 5 years
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Best for Mid-Size Rooms

Levoit Core 600S

$299.99 list price

Levoit lists a CADR of 391 CFM and rates the unit for 606 sq ft at 4.8 air changes an hour. It has app control and an auto mode.

Best for: Bedrooms and mid-size rooms with no active mold growthFilter: No figure on file
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Air Purifier vs Dehumidifier vs Remediation

These three tools work on different parts of the mold problem. You need all three for a complete solution, they are not interchangeable.

ToolWhat It DoesWhat It Does Not DoWhen to Use
Air purifier (HEPA)Catches mold spores that are already in the airDoes not kill mold, stop mold growing or lower humidityAlongside the other two, never in place of them
DehumidifierTakes moisture out of the airDoes not remove spores in the air or clean up mold that is thereWhen indoor humidity will not stay below 60%. The EPA's ideal range is 30 to 50%
Mold clean-upRemoves the mold itselfDoes not last if the water problem is not fixedWhen you can see mold. The EPA says an area under about 10 square feet is usually a job you can do yourself

Humidity: The Number That Controls Mold

30 to 50% RH

Ideal

The EPA's ideal range for indoor humidity.

50 to 60% RH

Upper limit

The EPA says to keep indoor humidity below 60 percent.

Above 60% RH

Too damp

Above the EPA's limit. Find the source of the moisture and dry the space out.

The EPA says a humidity meter is a small tool that costs $10 to $50. Check the basement and bathroom, these are the most common problem areas. See our best dehumidifier guide if humidity is consistently above 50%.

Related Guides

Best Dehumidifiers, the other half of the mold solutionBest Air Purifiers for AllergiesBest Air Purifiers Overall (2026)

Common Questions

Can an air purifier get rid of mold?

No. It catches spores that are floating in the air. It does not remove the mold. The EPA says the key to mold control is moisture control: clean up the mold and fix the water problem.

What type of filter catches mold spores?

Mold spores in the air are particles, and a HEPA filter is made for particles. The EPA's MERV table lists a HEPA filter at 99.97% or more for particles of 0.3 microns. For a musty smell you would also want activated carbon.

Should I run an air purifier or a dehumidifier for mold?

They do different jobs. A dehumidifier lowers humidity. An air purifier catches spores in the air. Neither one removes mold that is already growing. The EPA's first step is to fix the water problem.

What humidity level should I aim for?

The EPA says to keep indoor humidity below 60 percent, and ideally between 30 and 50 percent. It says a humidity meter is a small tool that costs $10 to $50.

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 .