Dryer Vent Cleaning in San Mateo, CA
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Step 1 of 3: Equipment
Cold vents make lint stick
Your dryer pushes out warm, damp air, and that air has to travel through a vent that runs through a cold attic or wall space. Heat is needed here from November through May, and on winter nights that average 43°F, the vent walls are cold enough to cool that air fast. Lint that would otherwise blow straight out the hood sticks to the damp walls instead.
A vent that narrows with lint cannot move air the way it should. Heat and moisture back up into the duct instead of clearing the house, and that damp buildup is what a clogged vent is made of.
- 43°F
- the average winter night, and cold vents catch damp lint
- 7 months
- November through May, the vent stays cold
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NOAA nClimDiv, 1991–2020 normals
- How often should a dryer vent be cleaned?
- Once a year for most households. If you run large loads often, or you have a long vent run with a lot of bends, check it more often since lint has more places to catch. A vent that stays short and straight will run cleaner longer than one that snakes through the attic or around corners.
- Can I clean my dryer vent myself?
- You can clean the part you can reach, but that is usually not the whole vent. A vent brush kit will clear lint near the dryer and near the outside hood, but most vents run several feet through walls or the attic, and lint builds up in the middle of that run too. A contractor has the rods and camera to clear the full length and check that the vent still pushes air out properly at the hood.
- What are the signs of a clogged dryer vent?
- Clothes that take longer than usual to dry, or come out hotter than normal, are the first sign. You may also notice the outside of the dryer feels hot, the vent hood outside barely moves when the dryer runs, or you smell something burning during a cycle. Lint building up around the lint trap area faster than before is another sign the air isn't moving through the vent the way it should.