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Old 08-30-2013, 08:09 PM   #1
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Venting dryer directly downwards

I need to vent my dryer through the floor. The floor is 3x6 T&G fir. Beneath that are joists, logs, and the river is 2 feet below the floor. So it really doesn't matter if I am venting moist air beneath the house. The wind will blow it away.

What I really want to know is: does anyone know of a termination which will allow the dryer to vent, but which will keep pests out? I can easily poke a hole in the floor and stick a duct down, but what do I put on the bottom of it? Standard dryer vent fittings are made to go through a wall and have a flapper that closes when the dryer is not running. That will obviously not work for me. Is there a nice fitting or should I just bend some hardware screen over the end and put a couple of screws in it?

Thank you.


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Old 08-30-2013, 08:32 PM   #2
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The damper is spring loaded and opens with enough air pressure from the dryer. You do need to have access to this from the exterior as it requires periodic maintenance. Especially with the added humidity. Lint accumulates and will block the air's exit resulting in your dryer element burning out or even a house fire.


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Old 08-31-2013, 04:03 AM   #3
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Use solid pipe and pop rivets, add an elbow and use a standard vent cap.
I like the ones I've found at Lowes that have a flap but no screen to get clogged up.
Also the ones with louvers always hang up and plug up with lint.
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Old 08-31-2013, 06:29 AM   #4
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Originally Posted by joecaption View Post
Use solid pipe and pop rivets, add an elbow and use a standard vent cap.
I know it's against code to use screws on dryer vent pipe. Is it really OK to use rivets? Just curious.
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