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Why are bathroom fans in ceiling? Bill 05-30-2008
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Posted by GMDuggan on June 4, 2008, 12:40 am
Just from a practical standpoint, unless the exhaust fan is located on
an exterior wall, it is easier to vent the fan if it is in the
ceiling. Mounting the fan in an interior wall presents the problem of
running the duct, presumably 3"-6", through the top plate of the
wall. A ceiling mount allows you to duct to the outside via attic, or
the space between joists.

> Why are bathroom exhaust fans mounted in the ceiling?
>
> Wouldn't down low next to the toilet be a better location?
>
> Maybe even lower than the toilet and behind the toilet. Then the "smell"
> would go down and back instead of forward and up!


Real Goods Solar, Inc.
Posted by DerbyDad03 on June 10, 2008, 5:51 pm
> Just from a practical standpoint, unless the exhaust fan is located on
> an exterior wall, it is easier to vent the fan if it is in the
> ceiling. =A0Mounting the fan in an interior wall presents the problem of
> running the duct, presumably 3"-6", through the top plate of the
> wall. =A0A ceiling mount allows you to duct to the outside via attic, or
> the space between joists.
>
>
>
>
> > Why are bathroom exhaust fans mounted in the ceiling?
>
> > Wouldn't down low next to the toilet be a better location?
>
> > Maybe even lower than the toilet and behind the toilet. Then the "smell"=

> > would go down and back instead of forward and up!- Hide quoted text -
>
> - Show quoted text -

re: Mounting the fan in an interior wall presents the problem of
running the duct, presumably 3"-6", through the top plate of the wall.

Through the top plate? How wide are your walls that you could run a 3"
- 6" duct *through* the top plate?

Posted by Doug Brown on June 11, 2008, 8:44 pm

> Just from a practical standpoint, unless the exhaust fan is located on
> an exterior wall, it is easier to vent the fan if it is in the
> ceiling. Mounting the fan in an interior wall presents the problem of
> running the duct, presumably 3"-6", through the top plate of the
> wall. A ceiling mount allows you to duct to the outside via attic, or
> the space between joists.
>
>
>
>
> > Why are bathroom exhaust fans mounted in the ceiling?
>
> > Wouldn't down low next to the toilet be a better location?
>
> > Maybe even lower than the toilet and behind the toilet. Then the "smell"
> > would go down and back instead of forward and up!- Hide quoted text -
>
> - Show quoted text -

re: Mounting the fan in an interior wall presents the problem of
running the duct, presumably 3"-6", through the top plate of the wall.

Through the top plate? How wide are your walls that you could run a 3"
- 6" duct *through* the top plate?

I think that kind of implies what the problem is -----

If you try to run the duct up inside the wall and "through" the top plate
you effectively destroy the top plate?



Posted by DerbyDad03 on June 12, 2008, 2:46 pm
>
>
>
>
>
>
> > Just from a practical standpoint, unless the exhaust fan is located on
> > an exterior wall, it is easier to vent the fan if it is in the
> > ceiling. Mounting the fan in an interior wall presents the problem of
> > running the duct, presumably 3"-6", through the top plate of the
> > wall. A ceiling mount allows you to duct to the outside via attic, or
> > the space between joists.
>
>
> > > Why are bathroom exhaust fans mounted in the ceiling?
>
> > > Wouldn't down low next to the toilet be a better location?
>
> > > Maybe even lower than the toilet and behind the toilet. Then the "smel=
l"
> > > would go down and back instead of forward and up!- Hide quoted text -
>
> > - Show quoted text -
>
> re: Mounting the fan in an interior wall presents the problem of
> running the duct, presumably 3"-6", through the top plate of the wall.
>
> Through the top plate?How wide are your wallsthat you could run a 3"
> - 6" duct *through* the top plate?
>
> I think that kind of implies what the problem is -----
>
> If you try to run the duct up inside the wall and "through" the top plate
> you effectively destroy the top plate?- Hide quoted text -
>
> - Show quoted text -

I read the problem to be that it would be *harder* to run the vent
through the top plate than to simply run it into the attic through the
ceiling, like it would be harder to run a wire through the top plate
than to run it through the ceiling.

I don't consider a complete severing of the top plate to be "through
it".

I believe "through" implies that there is some material left
surrounding the hole.

Posted by FatChance on June 13, 2008, 12:50 pm
DerbyDad03 wrote:
>>
>>
>>
>>
>>
>>
>>> Just from a practical standpoint, unless the exhaust fan is located on
>>> an exterior wall, it is easier to vent the fan if it is in the
>>> ceiling. Mounting the fan in an interior wall presents the problem of
>>> running the duct, presumably 3"-6", through the top plate of the
>>> wall. A ceiling mount allows you to duct to the outside via attic, or
>>> the space between joists.
>>>> Why are bathroom exhaust fans mounted in the ceiling?
>>>> Wouldn't down low next to the toilet be a better location?
>>>> Maybe even lower than the toilet and behind the toilet. Then the "smell"
>>>> would go down and back instead of forward and up!- Hide quoted text -
>>> - Show quoted text -
>> re: Mounting the fan in an interior wall presents the problem of
>> running the duct, presumably 3"-6", through the top plate of the wall.
>>
>> Through the top plate?How wide are your wallsthat you could run a 3"
>> - 6" duct *through* the top plate?
>>
>> I think that kind of implies what the problem is -----
>>
>> If you try to run the duct up inside the wall and "through" the top plate
>> you effectively destroy the top plate?- Hide quoted text -
>>
>> - Show quoted text -
>
> I read the problem to be that it would be *harder* to run the vent
> through the top plate than to simply run it into the attic through the
> ceiling, like it would be harder to run a wire through the top plate
> than to run it through the ceiling.
>
> I don't consider a complete severing of the top plate to be "through
> it".
>
> I believe "through" implies that there is some material left
> surrounding the hole.

The reason the fan is there or required is for moisture not smells.
It's called a "fart fan" as a joke. The moisture occurs from
shower/bathing and usually rises because of the warmth. The codes
usually specify a certain amount of "air changes" per hour for an
exhaust fan.
--

Page 7 of 8       < 1 2 3 > last >>
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