On Jun 1, 10:17*pm, "MiamiCuse" wrote:
I am installing two Panasonic bath exhaust fans - one FV-08VQ3 and one
FV-11VQ3.

Because of the difference in size and location of the new fan, I have to
extend the existing 4" sheet metal conduit to the new fan. *They are about
30" apart. *Should I use new sheet metal conduit to bridge this 30" or
should I use a "coiled" looking flex conduit? *or PVC pipes?

The flex pipe is widely used for these applications because it's easy
to work with. That's what I would use.




I need to cut the existing sheet metal pipe back a bit, what is the best way
to do this? *The attic space is tight I am pretty much limited to hand
tools.

Tin snips.



Also, I traced the conduit and found that all the bath exhaust conduit do
not exit the roof, but simply extended to the roof overhang and sat on top
of soffit openings. *Is that ok? *When the fan is on and moist air is drawn,
part of it will exit the soffit vent, but part of it will go inside the
attic. *Is this acceptable?

No, the fan vent should have a direct exit. If it's just laid on top
of the soffit, as you pointed out, a considerable amount, maybe even
most of the air, is going to go back into the attic. Plus, the
soffit area is going to be cold, perfect for condensation to occur.
Probably much less of an issue in Maimi than northern climates, but
I'd still do it right. Plus, I would expect your code would require
it to be properly vented.





Thanks,

MC