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Posted by HVAC on January 24, 2009, 10:10 am
There's probably a reason it's left open.
Perhaps the make up air units are fail and
the CO is getting too high.
Ask some questions before you waste your time.
> Help me, O'bewon, you're my only hope.
> I'm just a reasonably competent bystander, hence my
> call out to the experts.
> The situation I'm facing is that my apartment complex has
> an enclosed, large (100 or so) car garage with a "lift door"
> at one end. (It's also got an upper level with a separate
> roadway entrance, and that one uses a remote controlled door).
> The garage is heated to a nominal 60 or so degrees, using
> low pressure steam from the main powerhouse that's fed
> into a half dozen or so blowers. We're in NYC so this
> means heating is needed a decent portion of the year.
> My question, and I'm hoping you'll treat me gently, is
> that the garage door is generally left open full time.
> (There's a staffed attendant room just inside, which has its
> own walls, heating, and a door into the main garage).
> There's got to be a huge heat loss issue here, but I'll be
> honest and admit I don't have the slightest clue as to
> how to calculate it. (I'd have no problem with working out
> the numbers for a wall, but I can't even guess at how to
> handle an opening like this).
> Could anyone give me a pointer to what the figures would be?
> I'm just looking for a rough enough number so that I can
> tell the management to get a "real" one - which I'm 99 percent
> sure will come to teh conclusion that we'd be better off
> keeping the door closed, giving everyone remote controls,
> and even adding some more windows and tv monitors to the
> guard booth.
> The opening is about ten feet wide by eight feet high. There
> are walls extending out another fifteen or so feet on each
> side, and the garage itself is loosely sealed masonry (cinderblock)
> with a bunch of vents scattered around.
> In other words, there's no major breeze going through that
> doorway, but clearly there's lots of mixing.
> (Of course when there's a big wind, etc., etc.)
> Thanks for your help.
> --
> _____________________________________________________
> Knowledge may be power, but communications is the key
> dannyb@panix.com
> [to foil spammers, my address has been double rot-13 encoded]
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> I'm just a reasonably competent bystander, hence my
> call out to the experts.
> The situation I'm facing is that my apartment complex has
> an enclosed, large (100 or so) car garage with a "lift door"
> at one end. (It's also got an upper level with a separate
> roadway entrance, and that one uses a remote controlled door).
> The garage is heated to a nominal 60 or so degrees, using
> low pressure steam from the main powerhouse that's fed
> into a half dozen or so blowers. We're in NYC so this
> means heating is needed a decent portion of the year.
> My question, and I'm hoping you'll treat me gently, is
> that the garage door is generally left open full time.
> (There's a staffed attendant room just inside, which has its
> own walls, heating, and a door into the main garage).
> There's got to be a huge heat loss issue here, but I'll be
> honest and admit I don't have the slightest clue as to
> how to calculate it. (I'd have no problem with working out
> the numbers for a wall, but I can't even guess at how to
> handle an opening like this).
> Could anyone give me a pointer to what the figures would be?
> I'm just looking for a rough enough number so that I can
> tell the management to get a "real" one - which I'm 99 percent
> sure will come to teh conclusion that we'd be better off
> keeping the door closed, giving everyone remote controls,
> and even adding some more windows and tv monitors to the
> guard booth.
> The opening is about ten feet wide by eight feet high. There
> are walls extending out another fifteen or so feet on each
> side, and the garage itself is loosely sealed masonry (cinderblock)
> with a bunch of vents scattered around.
> In other words, there's no major breeze going through that
> doorway, but clearly there's lots of mixing.
> (Of course when there's a big wind, etc., etc.)
> Thanks for your help.
> --
> _____________________________________________________
> Knowledge may be power, but communications is the key
> dannyb@panix.com
> [to foil spammers, my address has been double rot-13 encoded]