After a Smoky July in Avon: Is Your HVAC Still Circulating Wildfire Smoke?

July was a smoky month in Avon. When the state’s air-quality advisory expanded to take in Eagle County in the second week of July, people from Vail to Eagle woke up to hazy skies, with smoke blowing in from the Willow Fire in neighboring Lake County and from larger fires burning farther south. The sky has cleared more than once since then, but the smoke that came through your home did not all leave with it. A good share of it is still sitting in your heating and cooling system. If the house smells faintly of campfire every time the fan kicks on, that is the reason, and it is where professional fire and smoke restoration usually starts.

This guide covers how smoke gets trapped in ductwork, the signs your system is holding on to it, what you can do yourself this week, and when the ducts need a crew.

Why smoke stays in the ducts after the sky clears

1. The system ran through the worst of it. Every hour the fan ran during a smoke event, it pulled fine particulate across the filter, the coil, and the full length of the ductwork.
2. Soot is oily. Wildfire residue does not behave like household dust. It sticks to sheet metal, flex duct, and insulation, and it holds odor.
3. Filters only catch part of it. The standard one-inch filter in most Avon homes is built to protect the equipment, not to stop the fine particles that make up wildfire smoke.

Signs your system is recirculating smoke

• A smoke smell at startup. The odor is strongest in the first minute after the fan comes on, then fades.
• Dark streaks around supply registers. Gray or black marks on the ceiling or wall next to a vent show what the air is carrying.
• Filters that gray out in days. A new filter should not look used within a week.
• Symptoms that follow the fan. Scratchy throats and headaches that show up when the system runs and ease when it is off.

What to do this week

1. Change the filter. Step up to the highest rating your equipment supports. Many systems take a MERV-13, but check the manual first, because a filter that is too restrictive strains the blower.
2. Wipe the registers with a damp cloth. Dry dusting smears soot and puts it back in the air.
3. Keep the fresh-air intake closed on smoky days. Stage 2 fire restrictions are still in force across Eagle County, and the fire season is far from over.
4. Photograph what you find. A dated picture of a blackened filter or a streaked register is useful if you end up filing a claim.

What DRS does on site

Our crews are based in Eagle County and respond 24/7. A smoke-related HVAC visit in Avon typically includes:

• Inspection of the air handler, coil, and duct runs for soot loading
• Source-removal duct cleaning under negative pressure, so residue leaves the house instead of moving to another room
• Cleaning of registers, returns, and the blower compartment
• Odor treatment for residue bonded into the system and nearby finishes
• Photos and a written scope of work your insurer can use

Common mistakes Avon homeowners make

• Covering the smell. Scented filters and sprays hide the odor for a few days and leave the residue in place.
• Cleaning every room but the ducts. The system coats the house again the next time it runs.
• Waiting for heating season. The first furnace cycle in the fall bakes the residue and brings the smell back stronger.

When to call a pro versus handle it yourself

A filter change and a damp wipe of the registers are jobs you can do today. If the smell returns every time the system starts, if you see soot at the vents, or if someone in the home has asthma or another respiratory condition, have the system inspected and cleaned properly.

If your home still smells like July, we can find out why. See how we serve Avon or request an inspection.