Mold Remediation Equipment: A Practical Guide

Mold remediation done right protects the building, the occupants and the workers. Done wrong, it spreads spores throughout the structure and creates a worse problem than what you started with. The IICRC S520 standard sets the framework, and the equipment list below is what professional remediators carry to every job.

Containment first

Before any equipment is plugged in, the work area is sealed with 6 mil polyethylene sheeting and tape. A decontamination chamber at the entry holds equipment and PPE during transitions. Containment prevents cross contamination — when you cut open moldy drywall, spores will move with air, and they need somewhere controlled to go.

Negative air machines

A negative air machine pulls air from inside the containment, runs it through HEPA filtration, and exhausts it outside the work zone (usually through ducting to an exterior window or vent). This creates negative pressure inside the containment so any leaks pull clean air in rather than push contaminated air out.

Size to 4 to 6 air changes per hour minimum. A 1500 CFM unit handles a 250 square foot containment with 8 foot ceilings at 4 ACH. Browse our air scrubber collection for sized options.

HEPA air scrubbers

Used inside the containment to continuously filter the air during work. Different from negative air machines because they recirculate cleaned air back into the room rather than exhausting it. Size at the same air change rate. Many smaller jobs use a single unit that does double duty by being ducted out as a negative air machine.

HEPA vacuums

For removing settled dust and spores from surfaces during and after the work. Standard shop vacs are not enough — they release spores back into the air. HEPA certified vacuums (99.97 percent at 0.3 microns) are the only acceptable choice. Use them on every porous and semi-porous surface in the containment before clearance testing.

Dehumidifiers

Mold needs moisture to grow. Drying the structure to below 60 percent relative humidity stops new growth and lets existing affected materials stabilize. Commercial LGR (low grain refrigerant) dehumidifiers pull 130 to 240 pints per day. Sized at 30 to 70 pints per 1000 square feet of affected area depending on saturation.

Air movers

Speed up drying by moving air across wet surfaces. Centrifugal air movers push air at the floor for drying carpet and pad. Axial fans move bulk air through the space. Used in combination with dehumidifiers to bring water out of the structure.

Moisture meters and thermal imaging

Pin meters measure moisture in materials directly. Pinless meters scan walls without damage. Thermal imaging cameras spot temperature differences that indicate hidden moisture. Used at the start to map the affected area, during work to track drying progress, and at the end to verify the structure is dry before clearance.

Antimicrobials and cleaning agents

EPA registered antimicrobials kill the surviving spores after removal. Hydrogen peroxide based products are common. Quaternary ammonium products are also used. Always follow the label dwell time. Always use PPE — many antimicrobials are skin and respiratory irritants.

Personal protective equipment

• Half face P100 respirator minimum, full face for heavy work
• PAPR (powered air purifying respirator) for crews working long days
• Tyvek suits with hood, sealed at wrists and ankles
• Nitrile gloves over inner cotton gloves for sweat absorption
• Eye protection sealed around the face
• Boot covers changed when leaving containment

Removal tools

Reciprocating saws cut affected drywall and trim. Pry bars remove baseboards and casings. Encapsulants seal materials that cannot be removed (structural framing for example) — these are mold resistant coatings tested for the application. Wire brushes and sanding blocks clean surface mold from solid wood framing.

Documentation tools

Cameras, moisture readings, before-and-after notes. Documentation supports the clearance decision and the insurance file. Many remediators use a tablet based system that timestamps every reading and photo.

Standard kit for a mid-size job

1. 2 negative air machines (1500 CFM each)
2. 2 HEPA air scrubbers
3. 2 HEPA vacuums
4. 2 LGR dehumidifiers (130 PPD each)
5. 6 air movers
6. 1 thermal imaging camera
7. 2 pin and pinless moisture meters
8. Containment supplies (poly, tape, zipper doors)
9. Antimicrobial sprayer
10. PPE for 4 person crew with 50 percent reserve

Frequently asked questions

Do I need a license to remediate mold?

Varies by state. Check your state department of health. Even where licensing is not required, IICRC certification (specifically the AMRT — Applied Microbial Remediation Technician) is the industry standard.

Can a homeowner remediate mold themselves?

For areas under 10 square feet on hard surfaces, yes — with proper PPE and containment. For larger areas, structural penetration or HVAC involvement, hire a certified professional.

What is clearance testing?

An independent industrial hygienist takes air and surface samples after work is complete. Pass means spore counts are below background levels and within indoor air quality guidelines. Browse our air filtration equipment for IICRC compliant tools.