Duct Cleaning in Portsmouth, NH
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Step 1 of 3: Equipment
Eight months of heat moving through the same ducts
Your furnace runs October through May here, eight months of the year. That is eight months of air pushed through the same trunk lines and branches, carrying dust into the rooms every time the burner fires. On nights that average 18°F, it fires often.
Duct cleaning does not change how cold it gets outside. It changes what is in the air the furnace is pushing through the house all winter.
- 8 months
- October through May, your furnace pushes air through your ducts
- 2 months
- July through August, your air conditioner does the same
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NOAA nClimDiv, 1991–2020 normals
- How often should air ducts be cleaned?
- There is no fixed schedule that fits every house. Clean them when there is a reason to, dust visibly blowing out of the vents, a new pet in the house, a renovation that left drywall dust behind, or rodents or water that got into the ductwork. Without one of those signs, most homes do not need it on a regular basis.
- Is air duct cleaning worth it?
- It is worth it when there is a real problem behind it, not as routine upkeep. If you can see dust coming out of the vents, if a room never heats or cools right even though the furnace runs fine, or if there has been water or rodents in the ducts, cleaning solves something real. It will not fix a furnace or air conditioner that is not running right, so if the complaint is really about comfort or a high bill, a contractor should look at the equipment first.
- What does air duct cleaning involve?
- A contractor connects a vacuum to the ductwork and uses brushes or air tools to knock dust and debris loose inside the ducts, then pulls it out through the vacuum. Every vent and return in the house gets opened and cleaned, along with the main trunk lines that feed them. The blower and coil inside the furnace or air handler usually get cleaned too, since dust sitting there works its way into the ducts anyway.