Dryer Vent Cleaning in San Francisco, CA
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Step 1 of 3: Equipment
Cold nights turn dryer lint into a damp clog
San Francisco winter nights average 45°F from December through February. The air coming off your dryer is warm and carries moisture with it, and once it hits the cold walls of the vent, it cools fast. That moisture condenses on the metal, and lint that would otherwise blow straight through sticks to the damp surface instead.
Over time that buildup narrows the vent. Air moves slower, so the next load takes longer to dry, and the dryer runs hotter than it should trying to push air through. A blocked vent also has nowhere to send the moisture and heat but back into the room around it.
- 45°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?
- A contractor can tell you based on how the vent is run in your house, but the general guidance is once a year. A clean vent lets the dryer push hot, moist air outside quickly, and lint is what blocks that path over time. If you notice drying times creeping up before the year is out, that is a sign to have it looked at sooner.
- Can I clean my dryer vent myself?
- You can clean the first few feet, at the back of the dryer and where it meets the wall, by pulling the dryer out and vacuuming what you can reach. Most vent runs go much farther than that, through the wall and up or across to an outside hood, and lint builds up along the whole length. A contractor uses a rod and brush system or a vacuum built for the job to clear the full run, including bends you cannot see or reach.
- What are the signs of a clogged dryer vent?
- Clothes that take longer than one cycle to dry, or come out hotter than usual, are the clearest sign. Others are a burning smell while it runs, the outside vent hood flap staying shut or barely moving when the dryer is on, and lint collecting around the hood itself. Any of these means less air is getting out than should, and it is worth having the vent checked.