My main bathroom does not [yet] have an exhaust fan and I'd like to install
one. There is a ceiling light fixture that has two flood bulbs in it, one
regular and one heat bulb which we use when coming out of the shower. I was
thinking of replacing this light fixture with perhaps a combo light-fan unit
but I don't think they make one with a heat lamp in it.
So I could either purchase what I find on the net or in HD or keep the
existing light fixture and mount the fan between the fixture and the outside
wall.

Main question:
I could exhaust the fan straight out horizontally through the outside wall.
However, my kitchen is right next to the bathroom and a kitchen ceiling fan,
with duct work, leads straight up through the attic and roof for venting.
This kitchen fan duct is relatively close to the bathroom and I'm wondering
if instead of venting the bath fan horizontally out the side of the house
wall I could connect it up to the kitchen fan duct which runs up through the
attic to the roof.

Any thoughts on if this is advisable or might cause problems? I hardly ever
use the kitchen fan, by the way.

Thanks,
Walter

They do make heat lamp-vent units, but the vent cfm tends to be so low that
they're pretty worthless. You must vent the unit to the outside and you
cannot connect it to a kitchen exhaust unit vent



"Walter Cohen" wrote in message
...
My main bathroom does not [yet] have an exhaust fan and I'd like to
install one. There is a ceiling light fixture that has two flood bulbs in
it, one regular and one heat bulb which we use when coming out of the
shower. I was thinking of replacing this light fixture with perhaps a
combo light-fan unit but I don't think they make one with a heat lamp in
it.
So I could either purchase what I find on the net or in HD or keep the
existing light fixture and mount the fan between the fixture and the
outside wall.

Main question:
I could exhaust the fan straight out horizontally through the outside
wall. However, my kitchen is right next to the bathroom and a kitchen
ceiling fan, with duct work, leads straight up through the attic and roof
for venting. This kitchen fan duct is relatively close to the bathroom and
I'm wondering if instead of venting the bath fan horizontally out the side
of the house wall I could connect it up to the kitchen fan duct which runs
up through the attic to the roof.

Any thoughts on if this is advisable or might cause problems? I hardly
ever use the kitchen fan, by the way.

Thanks,
Walter

If you go through wall look at one of the panasonic fans, a bit spendy
but well made and quiet.
Walter Cohen wrote:
My main bathroom does not [yet] have an exhaust fan and I'd like to install
one. There is a ceiling light fixture that has two flood bulbs in it, one
regular and one heat bulb which we use when coming out of the shower. I was
thinking of replacing this light fixture with perhaps a combo light-fan unit
but I don't think they make one with a heat lamp in it.
So I could either purchase what I find on the net or in HD or keep the
existing light fixture and mount the fan between the fixture and the outside
wall.

Main question:
I could exhaust the fan straight out horizontally through the outside wall.
However, my kitchen is right next to the bathroom and a kitchen ceiling fan,
with duct work, leads straight up through the attic and roof for venting.
This kitchen fan duct is relatively close to the bathroom and I'm wondering
if instead of venting the bath fan horizontally out the side of the house
wall I could connect it up to the kitchen fan duct which runs up through the
attic to the roof.

Any thoughts on if this is advisable or might cause problems? I hardly ever
use the kitchen fan, by the way.

Thanks,
Walter

Walter Cohen wrote:

This kitchen fan duct is relatively close to the bathroom and I'm wondering
if instead of venting the bath fan horizontally out the side of the house
wall I could connect it up to the kitchen fan duct which runs up through the
attic to the roof.

Any thoughts on if this is advisable or might cause problems? I hardly ever
use the kitchen fan, by the way.

Thanks,
Walter

I'd check my local codes. That sounds like it could be one of those
"don't" things.

Also, backdrafts from the bathroom to the kitchen might be
unappetizing....

RBM rbm2(remove wrote:

... You must vent the unit to the outside and you
cannot connect it to a kitchen exhaust unit vent

Who sez? Why?

Nick

"Walter Cohen" writes:

Main question:
I could exhaust the fan straight out horizontally through the
outside wall.

That'd be my pick.

However, my kitchen is right next to the bathroom and a kitchen
ceiling fan, with duct work, leads straight up through the attic and
roof for venting. This kitchen fan duct is relatively close to the
bathroom and I'm wondering if instead of venting the bath fan
horizontally out the side of the house wall I could connect it up to
the kitchen fan duct which runs up through the attic to the roof.

Any thoughts on if this is advisable or might cause problems? I hardly ever
use the kitchen fan, by the way.

In this situation, kitchen fumes could be easily pushed into the
bathroom, and vice versa. As such, I'd be surprised if local codes
would allow it particularly given the grease-laden kitchen air's
likelihood of getting in contact with a bath exhaust fan that will
have large furry labels saying "not designed for kitchen use."

I *think* the reason for the labels is that unless a fan is
electrically designed to be moving greasy air, you can end up with a
fire hazard in a hurry, which I learned anecdotally:

Some exhaust fan specialist company in Chicagoland brilliantly
installed a bath fan in the ceiling over my stove which had lacked any
ventilation previously. A couple years after I had this fan added, I
started hearing arcing and fan stuttering. I powered it off, popped
the cover of the fan, and was immediately greeted by a big yellow
warning label "not designed for kitchen use." Ironically it was coated
with grease. I promptly wanted to throttle the company for installing
a big steaming fire hazard in my kitchen ceiling.

To their credit, all it took was one phone message to the company
explaining my discovery, my desire to have it corrected, that the
estimate contract specified a kitchen exhaust fan, and a subtle
friendly mention of the words "looming fire hazard" and "liability."

So in short, I'd play it safe and vent that baby out the side wall or
to its own dedicated roof cap.

Best Regards,
--
Todd H.
http://www.toddh.net/

requires separate venting to outdoors.
most heat/light/vent fans are a noisy idea. look at remote fan if you
can mount in attic.


Walter Cohen wrote:
My main bathroom does not [yet] have an exhaust fan and I'd like to install
one. There is a ceiling light fixture that has two flood bulbs in it, one
regular and one heat bulb which we use when coming out of the shower. I was
thinking of replacing this light fixture with perhaps a combo light-fan unit
but I don't think they make one with a heat lamp in it.
So I could either purchase what I find on the net or in HD or keep the
existing light fixture and mount the fan between the fixture and the outside
wall.

Main question:
I could exhaust the fan straight out horizontally through the outside wall.
However, my kitchen is right next to the bathroom and a kitchen ceiling fan,
with duct work, leads straight up through the attic and roof for venting.
This kitchen fan duct is relatively close to the bathroom and I'm wondering
if instead of venting the bath fan horizontally out the side of the house
wall I could connect it up to the kitchen fan duct which runs up through the
attic to the roof.

Any thoughts on if this is advisable or might cause problems? I hardly ever
use the kitchen fan, by the way.

Thanks,
Walter

Aside from the possibility of backflow from either source, the duct attached
to the kitchen exhaust would have been sized for the CFM flow of the kitchen
unit, not the combined flow of both the kitchen and bathroom fans, so it
would be to small to carry both at the same time without reduction in air
flow



wrote in message
...
RBM rbm2(remove wrote:

... You must vent the unit to the outside and you
cannot connect it to a kitchen exhaust unit vent

Who sez? Why?

Nick

wrote:
RBM rbm2(remove wrote:

... You must vent the unit to the outside and you
cannot connect it to a kitchen exhaust unit vent

Who sez? Why?

Most local building codes. You don't want the bath to smell like frying
fish and you don't want the kitchen to smell like .....



Nick

--
Joseph Meehan

Dia 's Muire duit

wrote:

Who sez? Why?

Most codes. Because they do not want cross venting to occur.

Joseph Meehan wrote:

wrote:
RBM rbm2(remove wrote:

... You must vent the unit to the outside and you
cannot connect it to a kitchen exhaust unit vent

Who sez? Why?

Most local building codes...

We use the ICC. What does it say?

Nick

wrote:

We use the ICC. What does it say?

You need to check with your local building inspector. Most localities in the US
use the ICC as the foundation for their codes, but then tailor it. Your local
building inspector has the final say.

Rick Blaine wrote:
wrote:

We use the ICC. What does it say?

You need to check with your local building inspector. Most localities in
the US use the ICC as the foundation for their codes, but then tailor it.
Your local building inspector has the final say.

We use the ICC. What does it say?

Nick

wrote:
Joseph Meehan wrote:

wrote:
RBM rbm2(remove wrote:

... You must vent the unit to the outside and you
cannot connect it to a kitchen exhaust unit vent

Who sez? Why?

Most local building codes...

We use the ICC. What does it say?

Nick

Frankly I don't care what the ICC says. Around here the local code
rules and it says don't do it. I might add that I think is is a really
stupid idea anyway and I would not do it even if the code allowed it.

--
Joseph Meehan

Dia 's Muire duit