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A residential attic interior with blown-in insulation on the floor, flexible silver HVAC ducts, a metal plenum box, and wooden rafters lit by light entering through a small louvered vent.

Duct Cleaning in Bowie, MD

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An attic interior showing a metal air handler unit connected to flexible silver-wrapped HVAC ducts running beneath a pitched wooden roof.

Seven months of heating pushes air through your ducts

Your furnace runs October through April here, seven months a year. On winter nights averaging 28°F, it cycles on and off for hours at a stretch, and every cycle pushes air through the same ductwork. Dust, pet hair, and whatever else is in that air settles along the way.

Bowie has seen its share of winter storms and damaging wind, and power interruptions with them. When a system shuts down and starts back up, it stirs up what has settled in the ducts since the last run. Over a full heating season, that buildup can work its way back into the air the furnace pushes 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 single-story house showing interior rooms with furniture and a network of ventilation ducts and an air handling unit running through the ceiling space.
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's no fixed schedule that fits every house. Homes with pets, a smoker, or someone with allergies tend to need cleaning more often than others. If you just moved in and don't know when the ducts were last cleaned, or you see dust blowing out of the vents when the furnace runs, that's reason enough to have a contractor take a look.
Is air duct cleaning worth it?
It's worth it when the ducts are visibly dirty, when there's been a pest problem or water damage inside them, or when dust keeps settling back on surfaces soon after you clean. It won't lower your heating bills, and it won't fix an air quality problem that isn't coming from the ducts themselves. A contractor can look inside the ductwork and tell you whether cleaning will actually help.
What does air duct cleaning involve?
A technician connects a vacuum system to the ductwork, then uses brushes or air tools to knock loose dust and debris so it pulls out through the vents. They work through the supply and return ducts and the vent covers, and usually through the coil and blower compartment near the furnace too. Once the cleaning is done, any access points opened to reach the ducts get sealed back up.
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