I am putting in a bathroom in my basement and know I need to vent the
fan. I plan on running the vent between the joists, but I'll need to
jog around the i-beam. is it okay to use flexible dryer-vent type
pipe to come down and then back up to get around the structural beam?
Essentially it would look lik ~~~~U~~~~~~ where the U is the flexible
vent pipe going underneath the beam? Other suggestions?
Yes you can use that flexible stuff. It will reduce the air flow
somewhat, but not too bad.
Frankly I would use it on a vent fan long before I would use it on a
dryer. It is double trouble when used on a dryer. First it reduces the air
flow and therefore the efficiency of the dryer and it also catches lint that
further reduces air flow and is a fire hazard. In the bath the lint is not
much of a problem.
I'd use solid elbows and pipe cut to size. The flex will add more air
resistance, the creases will catch dirt,lint and moisture and eventually
probably corrode thru. If you have a good sheet metal shop in your area you
can probably get an oval shaped pipe that would give you some additional
clearance if you need it, or could use it to go above the beam.
I'm not planning to put a shower in the basement bath, just a toilet
and sink. THerefore I'm not really worried about the condensation or
reduced air flow since I'm only putting the fan in to meet code. I
know that what I'm proposing is less than ideal, and if a significant
amount of moisture really needed to be exhausted then I'd probably
have planned it differently, but as it is, I just want to pass code.
To remove smells instead of having them go into the whole house and if
there is a bath/shower, to remove excess moisture. I think in most
places, the vent can either be a fan or a window, though I would
always want the fan.
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