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Serving Spokane · the Inland Northwest

HVAC Mold Removal in Spokane, WA

The vapor travels the ducts and the rooms they serve, so the system and the air get treated together. Air samples before and after go to an accredited lab.

Whole-Home Treatment
Independent Lab Verification
EPA Safer Chemical Ingredients List
Workmanship guaranteed On every My Pure Environment treatment
My Pure Environment technician inspecting an HVAC system for mold in Spokane, WA

“Terry was on time and was very professional. His down to earth personality, and his knowledge of the products was very beneficial.”

Brittney Anne · Google review

The furnace comes on in October and does not get much rest until April, and for those six months each room in the house breathes through the same ducts, which is why a good share of our winter calls end with HVAC mold removal in Spokane, WA.

Ductwork collects dust, and dust holds moisture. In a mid-century ranch in Spokane Valley or North Spokane the supply runs sit in a vented crawl space that spends the winter near freezing and the spring damp from the melt. Cold metal ducts sweat, the dust inside them gets wet, and the furnace then pushes air across it into the bedrooms.

Part of our Mold Remediation service in Spokane, WA.

Verified Reviews

In their own words.

A few of the Google reviews our clients have left after we finished the job.

Follow the air, not the stain

Mold in an HVAC system rarely shows itself. What you notice is a musty smell when the furnace first kicks on, worse in one room than another, or a family that feels worse at home than away. The source is usually somewhere along the run: a supply duct through a damp crawl space, the return plenum, the air conditioner's coil and drain pan, or the blower housing.

We start by inspecting the system and moisture-mapping the spaces the ducts pass through. If the crawl space is wet, that gets dealt with too, and Crawl Space Mold Removal covers that part of the job.

Count the days the windows stay shut

Spokane Clean Air's tally for 2020 to 2025 works out to roughly a week of unhealthy smoke days each summer, most of them landing in September. The local guidance for those days is to keep windows and doors shut, set the HVAC to recirculate, and run a MERV-13 filter without stopping. That is sound advice, and it means the house runs closed with a filter loaded with smoke particulate through the end of summer.

Then the cold arrives and the windows stay shut for a different reason. Winter inversions trap air in the Spokane valley from December to February, the stillest and dampest stretch of the year indoors. Six months of recirculated air through one set of ducts is a long time for anything growing in there.

Treat the ducts and the rooms they feed

The VaPURE process suits ductwork because it is a vapor. It travels the duct runs, the plenum and the air handler, then out into the rooms the system serves, treating mold throughout the system and the air itself rather than one length of pipe. The sterilant goes first. The antimicrobial protectant follows and stays on the duct surfaces to help resist regrowth.

The active component of the sterilant is on the EPA's Safer Chemical Ingredients List, and it breaks down into acetic acid (white vinegar), oxygen and water shortly after treatment. Everyone is out while it runs, including pets and plants. A typical treatment takes four to six hours and you come home that evening.

Test the air before and after

We take air samples in the rooms the system feeds before we start and again after, and an accredited independent lab reads both. You get the report. If you want the air checked on its own first, Air Quality Testing is a separate service.

Know what moves the price

The length and number of duct runs, whether the ducts sit in a crawl space or an attic, whether the system needs cleaning before treatment, the condition of the coil and pan, and lab testing. We inspect first and quote after, and the consultation costs nothing.

Why My Pure Environment

Why My Pure Environment.

Whole-Home Treatment

The vapor travels the ducts, the air handler and the rooms they serve, treating the system and the air together.

Independent Lab Verification

Samples from the rooms the system feeds, before and after, read by an accredited third-party lab.

EPA Safer Chemical Ingredients List

The sterilant's active component is on the list, and it breaks down into acetic acid, oxygen and water soon after treatment.

Frequently Asked

What people ask us.

Have a question we haven't answered? Contact us, or call 866-940-1153.

No. Duct cleaning removes dust and debris. HVAC mold removal treats what is growing on the duct surfaces and in the air. Some systems need both, and we will say which.

The ducts are how the house moves its air, so anything growing in them reaches the rooms. That is why we treat the rooms and the system together.

The regional smoke guidance says yes, on recirculate with a MERV-13 or better filter. Change the filter once the smoke clears; a loaded filter holds moisture as well as ash.

Rarely. Metal ducts treat well. Flex duct or duct board that has gone soft or holds water may need replacing, and we tell you that before work starts.

Schedule Your Free Consultation

Get the ducts checked before furnace season.

Book a free consultation and we will inspect the system and moisture-map the crawl space it runs through.

Or call us directly 866-940-1153
Where We Work

Serving Spokane & the Inland Northwest.

We work across Spokane and Spokane County, from the South Hill and Spokane Valley out to Liberty Lake, Cheney and Mead, and over the state line into Coeur d'Alene, Post Falls and Sandpoint, ID. See our full service area list.