Pennsylvania HVAC Pros
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 Scranton, PA

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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.

Nine months of heating a year fills your ducts fast

Your furnace runs September through May here, nine months of the year. That's nine months of air moving through the same ductwork, carrying dust and whatever else settles in a house, past the return and out through every vent.

Winter nights here average 19°F, and the county has seen 16 winter storms and 127 damaging wind events over the past ten years. When a storm cuts power and the furnace stops, then starts back up once it's restored, it pushes through whatever settled in the ducts while the system sat idle.

9 months
September through May, your furnace pushes air through your ducts
2 months
July through August, your air conditioner does the same
Isometric cutaway illustration of a single-story house with a shingled roof, showing interior rooms with furniture and a network of white ducts and pipes running through the ceiling space.
Your ducts carry heat September through May and cooled air July through August.

NOAA nClimDiv, 1991–2020 normals

How often should air ducts be cleaned?
There is no fixed schedule that fits every house. If someone in the house has allergies, or you have pets shedding into the return vents, or you just finished a renovation that kicked up drywall dust, that is when to have them looked at. Ducts that sat open during construction pull in the most debris and are worth checking sooner rather than later. A contractor can look inside with a camera and tell you whether they actually need cleaning.
Is air duct cleaning worth it?
It depends on what is actually in your ducts. If you can see dust blowing out of the vents, or you pull out a duster's worth of buildup from the return grille, cleaning will make a real difference in the air moving through the house. If the ducts look fine and the filter has been changed on schedule, you are probably paying for something you do not need yet. A contractor can look inside with a camera and tell you which situation you are in before you commit to anything.
What does air duct cleaning involve?
A contractor connects a vacuum to the duct system and uses brushes or air tools to knock loose dust and debris from the inside walls of the ducts, then pulls it out through the vacuum. They will also clean the supply and return grilles and check the coil and blower compartment near the furnace, since debris collects there too. The whole system runs as one loop, so cleaning it properly means going through the ducts that feed every room, not just the ones you can reach easily.
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