Air scrubbers are the most underrated piece of equipment on a restoration job, and also the most commonly skipped. If a contractor cuts mold drywall without one running, they're spreading spores through your HVAC system instead of removing them.
What an Air Scrubber Actually Does
A negative-air machine pulls room air through a three-stage filter (pre-filter, activated carbon, medical-grade HEPA). The clean air is exhausted outside the containment zone. Two outcomes: airborne particle counts drop, and the contained area stays at negative pressure so contaminants can't escape.
Jobs That Require One
- Mold remediation: mandatory per IICRC S520.
- Fire and smoke restoration: required during soot vacuuming and odor neutralization.
- Sewage / Cat 3 water: required during structural cutting.
- Trauma and biohazard cleanup: required for the entire scope.
- Drywall demolition near occupants with asthma or allergies: strongly recommended.
How to Verify the Right Equipment Is On Site
- Ask for the make, model, and CFM rating. Reputable units: BlueDri AS-550, Phoenix Guardian R, Dri-Eaz DefendAir HEPA 500.
- Ask for the HEPA certificate of analysis. True HEPA filters 99.97% at 0.3 microns.
- Ask how many air changes per hour the contractor is targeting. The answer should be 4 to 6.
- Ask whether they'll perform post-remediation verification (PRV) before tearing down containment.
Why Cheap Restoration Companies Skip This
A pro-grade air scrubber rents for $40 to $80 per day and HEPA filters cost $80 to $200 each. On a 5-day job that's $300 to $600 the contractor would rather pocket. The homeowner doesn't see what's missing until mold reappears in 90 days.
Related Reading
See ourmold-after-water timelineand ourOklahoma indoor air quality guidefor context on why containment matters.
Need a Properly Equipped Crew?
Call (405) 992-4111 for IICRC-certified mold, fire, and biohazard restoration with HEPA air scrubbers on every job and post-remediation verification included.