Free HVAC mold tool

Find the mold hiding in your HVAC in 10 minutes.

Tap through 12 spots a pro would check. Export a branded PDF for your inspector or landlord. No signup, no email, no catch.

12 hotspots Free PDF export 100 percent private

Four factors visualized for the hvac mold inspection checklist tool — Four HVAC zones drive mold risk: coils, filter, drain pan, and vents.

How it works

Walk the 12 hotspots

Open the checklist, inspect each HVAC component in order. Use flashlight and phone camera.

Snap photos of issues

Attach a photo to each flagged item. Keeps a record for your HVAC tech and insurer.

Export the branded PDF

One-click PDF with your findings, timestamps, and photos. Forward to a pro for a quote.

Your HVAC inspection checklist

Tap the circle to mark each spot checked. Use your phone flashlight. If you see black, green, or slimy growth on any of these, STOP and call a licensed HVAC tech plus a mold remediator.

0 of 12 checked

Heads up: This is a visual self-check, not a professional inspection. If you see mold in any HVAC component, turn the system off and call a licensed HVAC technician plus a mold remediator. Running the HVAC with active mold growth spreads spores through every room.

Why HVAC mold is the silent source+

The whole house breathes through HVAC. Mold on any HVAC component gets blown into every room the system serves. That is why HVAC mold presents as "the whole house smells musty" rather than "one spot is gross."

Evaporator coils are the #1 site. The coil is always wet during cooling season. Dust collects on it. Those two ingredients plus warm air = a mold buffet.

The drain pan + condensate line are #2. Water pools. Biofilm grows. Blockage backs water into the air handler. By the time you notice a ceiling stain, the mold has been living in the handler for months.

Spring and fall are the 2 checkpoints. Run this checklist then.

FAQ

How do I know if my HVAC has mold?

Musty smell when the system runs, visible dark growth on the coil or in the supply vents, a yellow-green tint on the drip pan, mold in the air filter housing, or worse allergy symptoms in every room when the fan is on. Any one of these = shut the system off and inspect.

Can I clean HVAC mold myself?

Visible growth on hard HVAC surfaces (sheet metal, plastic housings) under 10 square feet: yes, with an N95 mask and gloves. Visible growth inside ductwork, on insulation, or anywhere larger than 10 sq ft: no. DIY spreads spores through the whole home. Call a licensed remediator.

How much does HVAC mold removal cost?

A coil cleaning is $200 to $450. A full duct cleaning is $400 to $1,000. Full HVAC mold remediation with containment is $1,500 to $7,000+ depending on system size and contamination level. Always get two quotes.

Should I run my AC if I suspect mold in it?

No. Running the system blows spores into every room. Turn it off, open windows if weather allows, and schedule an HVAC tech + mold inspector this week.

How often should I inspect my HVAC for mold?

Every spring before cooling season and every fall before heating season. Also after any water event (flooded basement, roof leak, burst pipe). Change filters every 60 to 90 days.