I would like to put exhaust fans in 2 bathrooms. should these fans
exhaust out the roof or can they just exhaut into the attic?

thanks


john

"coltrane" wrote in message
oups.com...
I would like to put exhaust fans in 2 bathrooms. should these fans
exhaust out the roof or can they just exhaut into the attic?

thanks


john


Roof only, and preferably through vents made specifically to accept the type
of duct normally used for such fans. The previous owners of my house did
sort of a hack job, using coat hanger wire to attach the duct to a normal
roof vent. Somehow, this hasn't caused problems, but when I re-roof soon,
it'll be fixed anyway.

coltrane wrote:
I would like to put exhaust fans in 2 bathrooms. should these fans
exhaust out the roof or can they just exhaut into the attic?

They should vent to the outside else you could have moisture problems in the
attic.

I say "outside" instead of roof because it is also possible to vent to a
soffit or wall.

On 2 Apr 2007 05:09:34 -0700, "coltrane"
wrote:

I would like to put exhaust fans in 2 bathrooms. should these fans
exhaust out the roof or can they just exhaut into the attic?

john

You don't want the moisture venting into your attic. You can vent to
the roof, or even the soffit. Either one will do the job.

Mark

On Apr 2, 8:09 am, "coltrane" wrote:
I would like to put exhaust fans in 2 bathrooms. should these fans
exhaust out the roof or can they just exhaut into the attic?

thanks

john

thanks to all. now I have to get the guts to open my roof

cheers

On Apr 2, 1:36 pm, "coltrane" wrote:
On Apr 2, 8:09 am, "coltrane" wrote:

I would like to put exhaust fans in 2 bathrooms. should these fans
exhaust out the roof or can they just exhaut into the attic?

thanks

john

thanks to all. now I have to get the guts to open my roof

cheers

If you don't have the guts like me, you can run the ductwork close to
a vent in the roof. I have an attic fan, and I ran my exhaust duct
close to the vent. I know this is not the correct way to do it, but I
did not want to risk any leaks by opening up my roof.

On Apr 2, 10:36 am, "coltrane" wrote:
On Apr 2, 8:09 am, "coltrane" wrote:

I would like to put exhaust fans in 2 bathrooms. should these fans
exhaust out the roof or can they just exhaut into the attic?

thanks

john

thanks to all. now I have to get the guts to open my roof

cheers

If the bathroom doesn't have a shower/bath then going into the roof
would be OK since you're not venting any moisture. I just put to
bathroom fans in my house, I just had a roofer guy install the vents.
I bought them at Home depot and he just charged me $75 to install
them.

Some tips when doing this.
1. Over size the fan. If the chart says 80 CFM go with at least 100
You will never be sorry that your fan works too well. It will also
let you have longer ductwork and reduce the possibility of getting
condesation drips.
I put a 110 in a 8x8 bathroom, and the shower can't even fog the
mirror.

2. Use a timer instead of a switch.

3. If you have a roofer install your vent, get up on the roof and mark
were you
want the vents, or be there when he's installing them. My roofer,
despite detailed drawings and measurments, still managed to put one
vent in the wrong spot, which made me use a lot longer duct length,
but still seems OK.

On 2 Apr 2007 05:09:34 -0700, "coltrane"
wrote:

I would like to put exhaust fans in 2 bathrooms. should these fans
exhaust out the roof or can they just exhaut into the attic?

thanks


john


Never a good idea to vent to the attic space. Try venting out to the
soffit area so that you don't need to poke a hole in the roof!