Duct Cleaning in San Antonio, TX
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Bexar County ductwork sits idle most of the year
Heat only runs November through March here, and even then the nights average 43°F, so the system is not working hard against the cold. That leaves ducts sitting still for long stretches, and dust settles in a duct that isn't moving air.
Bexar County has also seen its share of wind and winter weather, with 104 damaging wind events and 5 winter storms over the past ten years. Storms like that can push power out for a day or more, and a third of Texas households lost power for at least 24 hours in 2024. When the system shuts down and starts back up around outages like that, it stirs up whatever has settled in the ducts and sends it back through the house.
- 5 months
- November through March, your furnace pushes air through your ducts
- 7 months
- April through October, your air conditioner does the same
NOAA nClimDiv, 1991–2020 normals
- How often should air ducts be cleaned?
- There is no fixed schedule that fits every home. Homes with pets, recent renovation dust, or someone with allergies tend to need it more often than others. A better sign than any calendar is what you see at the vent covers. If dust is visibly building up there again not long after a cleaning, that tells you more than a general rule would.
- Is air duct cleaning worth it?
- It is worth it when your ducts actually have buildup, not as something to do on a routine basis. Homes with pets, recent construction work, or visible dust blowing out of the vents get real benefit from it. If nobody in the house has allergy trouble and you cannot see or feel dust at the registers, there is less to gain. A contractor can look inside the ducts and tell you honestly whether cleaning will make a difference in your case.
- What does air duct cleaning involve?
- A contractor connects a vacuum system to your ductwork, then uses brushes or air whips to knock loose dust and debris from the duct walls while the vacuum pulls it out. Each supply and return vent gets opened and cleaned individually. The blower and coil inside the furnace or air handler often get cleaned during the same visit since they collect the same dust. Afterward the vent covers go back on and the system gets checked to make sure everything is reconnected properly.