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Flexible insulated HVAC ducts and an air handler unit installed in a dusty attic with a skylight.

Duct Cleaning in Norristown, PA

Tell us about your home, and a licensed contractor who covers Montgomery County will get in touch.

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Step 1 of 3: Equipment
A residential attic with flexible silver HVAC ductwork connecting to an air handler unit, surrounded by blown-in fiberglass insulation and exposed wooden rafters.

Seven months of runtime pushes dust through your ducts

Your furnace runs October through April here, seven months a year. Every time it kicks on, air moves through the ductwork, and whatever is sitting in those ducts moves with it. Dust, pet hair, and the fine grit that gets in around windows and doors all get pushed into the supply runs and settle there between cycles.

Dust in the ducts means dust in the air moving through your living room and bedrooms for most of the year. A duct system that is choked with it also makes your furnace push harder to move the same amount of air through the house.

7 months
October through April, your furnace pushes air through your ducts
4 months
June through September, your air conditioner does the same
Isometric cutaway illustration of a house showing interior rooms with furniture and a network of metal ductwork connected to air handling units.
Your ducts carry heat October through April and cooled air June through September.

NOAA nClimDiv, 1991–2020 normals

How often should air ducts be cleaned?
There is no fixed schedule that fits every home. Homes with pets, smokers, or someone with allergies tend to need it sooner than others. If you can see dust building up around the vents or the system seems to be blowing dustier air than before, that is a better signal than any calendar date.
Is air duct cleaning worth it?
It depends on what is actually in the ducts right now. If there is visible mold, a pest problem, or heavy dust and debris built up inside them, cleaning is worth doing. If the ducts are in reasonable shape and the filter has been changed on schedule, cleaning will not make a noticeable difference. A contractor can look inside the ducts with a camera and tell you what is there before you decide.
What does air duct cleaning involve?
A contractor uses brushes and a high-powered vacuum to loosen and pull dust and debris out of the ductwork. The registers and vent covers come off so the equipment can reach inside each branch of the system. Once the ducts are clear, the covers go back on and the system is checked to make sure air is moving through it the way it should.
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