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Posted by hvac on October 4, 2006, 6:52 pm
Hi Mo,
Mo Hoaner wrote:
> > On 4 Oct 2006 12:39:51 -0700, yogieric.dev@gmail.com wrote:
> >
> >>Trying to heat a 27'x15' room with all but one of the 27' sections
> >>being outside walls. It currently has 2 supply registers - one on each
> >>15' outside wall - with the return on the 27' inside wall. Obvious
> >>place for a 3rd register (I think) is in the middle of the 27' outside
> >>wall. But the center of that wall contains a fireplace with a 2' deep
> >>hearth and an entertainment center. The ceiling peaks at about 11' and
> >>I have a ceiling fan that works well to push the heat down the walls.
>
> If you put insulation in the walls, that would help with the problem of the
> ceiling fan pushing the heat down them.
LOL. The ceiling fan circulates upward which causes the warm air
sitting at the ceiling to flow downward closer to the walls (not in
them).
The walls are insulated and except for a large set of french-doors, all
the windows are double pane.
> >>I could squeeze a 10"x8" vent to the left of the fireplace that would
> >>be slightly under the current entertainment center -- but who knows how
> >>furniture will change in the future (and moving entertainment center is
> >>not a good option - its already too off center IMO).
>
> You're not supposed to put a fireplace under an entertainment center - even
> slightly. That could cause a fire. As far as the furniture changing goes,
> generally a fireplace causes the wood to dry out, and the seat cushions to
> rot.
Very funny. The entertainment center is to the left of the fireplace.
If I were to put the vent to the left of the fireplace (close to the
wall as most vents are), I'd have to move the entertainment center
further to the left and I don't really want to do that.
> >>I'm wondering though if I put a 14"x6" vent in front of the 2' hearth
> >>-- will that be too inefficient -- too far from the wall? (I won't be
> >>using the fireplace and forced-air furnace at the same time.)
>
> What would you be venting to with such a large opening? The crawl space?
> That would be very inefficient, except during those times of the year that
> you just have the windows open. But remember, the air in the crawl space is
> usually very humid, so you might need to turn on the AC to help dehumidify
> the room.
A 14"x6" supply vent into a room 27'x15' is not very big. Will come
from 8" flex, so, say, ~200 CFM. Don't understand how I implied
anything about a crawl space. I just want to know the ramifications of
locating the vent 2'-2.5' from the wall instead of a few inches from
the wall.
Thanks,
Eric
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