A metal HVAC air handler with attached flexible and rigid ductwork installed in an unfinished attic with exposed wooden rafters and fiberglass insulation.

Duct Cleaning in Franklin, TN

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A flexible silver HVAC duct connects to a metal air handler unit mounted in an insulated attic with exposed wooden rafters and a circular gable vent.

Your ducts work seven months a year here

Franklin homes run heat from October through April, seven months a year. That is seven months of air moving through the same ductwork, over and over, carrying dust through the same runs day after day.

Winter storms add to it. The county has seen 10 winter storms and 205 damaging wind events over the last ten years, and storms like these knock out power. When a system sits off during an outage, dust settles in the ducts instead of moving through. When the power comes back and the system starts up again, it pushes that settled dust back into the air.

7 months: October through April, your furnace pushes air through your ducts
5 months: May through September, your air conditioner does the same

Isometric cutaway illustration of a small house with a dark shingled gable roof, showing interior rooms with furniture, a furnace unit, and branching ductwork with round ceiling vents.

Your ducts carry heat October through April and cooled air May through September.

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NOAA nClimDiv, 1991–2020 normals

How often should air ducts be cleaned?: Most homes do fine having their ducts cleaned every few years, though there is no fixed schedule that fits every house. A house with pets, someone with allergies, or a recent renovation may need it sooner since all of that adds more dust and dander to the system. If you can see dust coming out of the vents, that is a sign it is due.
Is air duct cleaning worth it?: It depends on what is going on in the ducts. If you see dust buildup, mold, or debris around the vents, or the house has been through a renovation that kicked up drywall dust and insulation, cleaning them clears that out. If the ducts look clean and nobody in the house has breathing trouble tied to the air, there may not be much to gain from it.
What does air duct cleaning involve?: A contractor uses specialized tools to loosen dust and debris built up inside the ductwork, then vacuums it out with a high-powered vacuum system. This covers the supply and return ducts, the grilles and registers, and usually the coils near the furnace or air handler since dust collects there too. The goal is to remove what has settled inside, not just what you can see at the vent.

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