Equipment reviews
Mold Treatment & Air Quality Equipment — Scrubbers and Removers
Three different jobs get confused here — containing spores, killing growth, and removing the stain. Buying the wrong one is why people repeat the work.
Quick answer
No product in this category fixes mould, because mould is a moisture problem wearing a biology costume — treat it without correcting the leak, condensation or humidity behind it and it returns within weeks. What these products do is contain and clean: a HEPA air scrubber captures 99.97% of particles at 0.3 microns and holds a work area under negative pressure so disturbed spores do not spread, a treatment such as Concrobium kills growth mechanically as it dries, and a stain remover clears the discolouration left behind.
Buying guides in Mold & Air Quality
Best HEPA Air Scrubber for Mold (2026): Pro Picks + CFM Guide
Top pick: BlueDri BD-AS-550-BL HEPA Air Scrubber· $429
Read the guide
Best Mold Killers for Water Damage Cleanup (2026)
Top pick: Concrobium Mold Control Spray
Read the guide
Best Mold Remover Sprays (2026): RMR-86 vs Mold Armor vs Concrobium
Top pick: Concrobium Mold Control (32 oz)
Read the guideAir Scrubber Rental vs Buying (2026): Which Makes Sense for Your Job
Top pick: BlueDri Air Shield 550 HEPA Air Scrubber (BD-AS-550)
Read the guideFrequently Asked Questions
What does a HEPA air scrubber actually do?
Two things. A true HEPA filter captures 99.97% of particles at 0.3 microns, which is the size range mould spores fall into, so the air leaving the machine is genuinely clean.
Second, running one with ducting out of a sealed work area creates negative pressure, meaning air flows into the containment rather than out of it. That is what stops a bathroom remediation from distributing spores through the rest of the house.
Is a mold killer the same as a mold stain remover?
NoAnd the distinction matters at purchase. A treatment such as Concrobium works mechanically — it crushes spores as it dries and leaves an antimicrobial barrier — but it does not bleach the mark out.
A stain remover such as RMR-86 removes the discolouration quickly on porous surfaces but leaves no lasting barrier. If the surface will be visible, you often want both, in that order.
Why does mould keep coming back after I treat it?
Because the moisture source is still there. Every product in this category treats the growth, not the cause, and mould re-establishes on the same surface within weeks if relative humidity stays above 60% or a leak continues.
Before buying anything here, find the water: a leak, condensation on cold surfaces, bare crawl space soil, or humidity nobody is controlling. Hold the space under 55% RH and the growth cycle stops on its own.
When should I stop DIY and call a remediation contractor?
The common thresholds are about 10 square feet of visible growth, any mould in the HVAC system, any Category 3 water involvement, and any situation where an occupant has asthma or is immunocompromised.
Beyond that, disturbing a large colony without containment and negative pressure spreads more spores than it removes, which is why professional remediation is built around containment first.
Who do I call right now for water damage?
Call (888) 840-6512. The line is answered 24 hours a day, seven days a week, and connects you with an IICRC-certified water damage restoration company that serves your area. Describe what you can see — where the water is coming from, how long it has been there, and whether it smells — the more specific you are, the faster the right company is on the line.
If the source is a pipe or an appliance, shut the main water valve first. Have four things ready and the call goes quickly: the address, when the water started, what is wet now, and whether you have filed an insurance claim.
Still not sure which of these is your situation? (888) 840-6512 · toll-free · answered 24/7