Dryer Vent Cleaning in Portsmouth, NH
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Cold vent runs, wet lint stays
Your dryer pushes out warm, damp air every load. On a night near 18°F, the vent pipe running through your attic or wall is cold, so that air cools fast on its way out. When it cools, the moisture in it lands on the vent walls, and lint sticks to the wet spots instead of blowing outside. Layer by layer, the vent narrows.
A narrow vent means the dryer has to push harder to get air out at all. That shows up as longer dry times, a dryer that runs hot to the touch, or a laundry room that feels damp after a load. The lint that builds up close to the wall cap is also the lint most likely to catch, since it sits right where the warm air meets the cold outside.
- 18°F
- the average winter night, and cold vents catch damp lint
- 8 months
- October through May, the vent stays cold
NOAA nClimDiv, 1991–2020 normals
- How often should a dryer vent be cleaned?
- Once a year for most households. Lint builds up inside the vent run itself, not just in the trap, and that buildup is what causes the problems. A contractor can check the full length while cleaning it, which tells you if yours needs more frequent attention.
- Can I clean my dryer vent myself?
- You can clean the lint trap and the first few feet of duct behind the dryer yourself with a vent brush kit. What you can't reach that way is the full run to the outside vent hood, especially if it's long or has turns in it. A contractor uses a brush and rod system built to clear the whole length and check that the vent hood flap is opening and closing the way it should.
- What are the signs of a clogged dryer vent?
- Clothes that take longer than one cycle to dry, or that come out hot instead of just warm, are the clearest sign. Others are a burning smell while the dryer runs, the outside vent hood barely pushing out air when you check it, and lint collecting around the dryer itself. Any of these means air isn't moving through the vent the way it needs to, and that's worth having looked at soon rather than waiting.