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- Newsgroups: misc.consumers.house
- Path: sparky!uunet!news.mentorg.com!news!fsf
- From: fsf@hpic006.mentorg.com (Rick Farnbach)
- Subject: Re: How to cut back my heat bill?
- Sender: news@news.mentorg.com (News User)
- Message-ID: <FSF.92Nov23144756@hpic006.mentorg.com>
- In-Reply-To: davidbu@loowit.wr.tek.com's message of 23 Nov 92 16:56:50 GMT
- Date: 23 Nov 92 14:47:56
- Distribution: na
- References: <1992Nov20.171452.2840@cbfsb.cb.att.com> <1992Nov20.175535.1694@osf.org>
- <1992Nov21.020021.25088@adobe.com> <10925@wrgate.wr.tek.com>
- Nntp-Posting-Host: hpic006.mentorg.com
- Organization: Mentor Graphics Corp. Wilsonville, OR
- Lines: 23
-
- There's been lots of talk about using resistive heating rather than (or in
- addition to) the heat pump when the house is really cold, but I just don't
- understand why you'd even want this.
-
- The efficiency of the heat pump is inversely related to the temperature
- differential between the cold source (outside) and the hot source (inside).
- Thus, your heat pump will save you the most energy when it is warmer outside,
- or when it is cooler inside. When you first turn the heat pump on after the
- house has cooled, it should be enormously more efficient at moving heat into
- the house than when it is running in temperature maintenance mode. In
- temperature maintenance mode it is trying to move heat into a hotter
- environment, which is harder to do.
-
- Why do heat pump manufacturers put in these self defeating thermostats that
- turn on resistive heat sources during the interval when the heat pump would be
- at its best?
-
- It seems you really should use the resisistive heating only to get those last
- couple of degrees of warmth, not to get the first few. If your heat pump
- isn't going to be able to get the job done, it will be at the top end not the
- bottom end of the temperature scale that it will need help.
-
- Rick
-