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From: ray@othervax.UUCP (Raymond D. Dunn)
Newsgroups: net.consumers
Subject: Re: Heat pump/water heater energy conservation
Message-ID: <748@othervax.UUCP>
Date: Mon, 23-Dec-85 14:40:35 EST
Article-I.D.: othervax.748
Posted: Mon Dec 23 14:40:35 1985
Date-Received: Wed, 25-Dec-85 03:47:41 EST
References: <237@neurad.UUCP> <728@decuac.UUCP> <5885@tekecs.UUCP>
Reply-To: ray@othervax.UUCP (Raymond D. Dunn)
Organization: Philips Information Systems - St. Laurent  P.Q., Canada
Lines: 16

In article <5885@tekecs.UUCP> johnt@tekecs.UUCP (John Theus) writes:
>
>For hot water heating, the most efficient heater is a heat pump hot water
>heater..
>Usually a large closet has sufficient air volume [as a heat source for
> the pump]
>
>While a normal electric hot water heater is 100% efficient in converting
>electricity to heat, a heat pump hot water heater is about 300% efficient.

When you are NOT heating the house this is true, however when the
house is being heated, you are essentially using the heat generated
by your house heater to heat the water.  This two stage process must
be less efficient than a direct water heater.

Ray Dunn.  ..philabs!micomvax!othervax!ray