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- Newsgroups: misc.consumers.house
- Path: sparky!uunet!walter!porthos!dasher!patter
- From: patter@dasher.cc.bellcore.com (patterson,george r)
- Subject: Re: boxing in a whole-house fan
- Organization: Bellcore, Livingston, NJ
- Date: Mon, 4 Jan 93 04:41:55 GMT
- Message-ID: <1993Jan4.044155.28918@porthos.cc.bellcore.com>
- References: <1993Jan4.023541.28570@ulysses.att.com>
- Sender: netnews@porthos.cc.bellcore.com (USENET System Software)
- Lines: 42
-
- In article <1993Jan4.023541.28570@ulysses.att.com> smb@research.att.com (Steven Bellovin) writes:
- >I strongly suspect that during the winter, we're losing a lot of warm air
- >through the louvres of the whole-house fan. Even if I sealed the top of
- >the fan with plastic, there still wouldn't be any insulation.
-
- You're correct. This is costing you.
-
- >My idea is to construct a plywood box around the fan, with permanent sides
- >about 12-15" high. In the winter, I'd add a lid on top of this, with
- >appropriate insulation and weather stripping.
- >
- >So -- first, will this actually do any good? Second, will the plywood box
- >impair the efficiency of the fan during the summer? The peak of the roof
- >is ~6.5' above the fan at the high point, alone one edge of the fan;
- >naturally, it slopes down from there.
-
- Taking #2 first, I'd guess that the box wouldn't hurt the performance of
- the fan, but that's a guess. Why don't you knock a rough box together next
- summer and try it out before you spend lots of time doing the permanent job?
-
- In the meantime, do what a friend of mine did. She simply laid pieces of
- faced insulation over the fan side by side, forming a solid layer over
- the fan. (Actually, she didn't do this - she hired me to do it.) I put
- the vapor barrier side down, and cut the pieces long enough to touch the
- regular attic insulation on all sides. It sort of formed a domed tent
- over the fan. Then we tripped the breaker to make sure nobody cut the
- thing on by mistake.
-
- She was quite satisfied with the results. She left it that way and put
- in an air conditioner.
-
- If it turns out that a box would interfere with the fan operation,
- perhaps you can build it in such a way that the entire box can be taken
- apart and removed each summer. Or you could hinge the sides so that they
- fold down.
-
- -----------------------------------------------------------------------
- |
- George Patterson - | If you maintain your motorcycle yourself,
- | eventually you will have two of them.
- |
- -----------------------------------------------------------------------
-