On Jun 1, 9:17*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?

Flex saves a lot of hassles at the cost of slightly less efficiency.

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.

Sheet metal pros use double cut aviation snips. Wiss is a good brand.
If all you need to trim is an inch or so, then conventional aviation
snips are OK.

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.

Joe