heat pump sizing (was Re: Digest for RE-wrenches at topica.com, issue 1936 [RE-wre

[Todd Cory, Mt. Shasta Energy Services]

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That is like asking the question I always get... "How much will it cost 
to put solar on my home?" Sizing a PV system is dependent upon the house 
electrical loads, their efficiency and the consciousness of the 
customer. The first step before active solar electric is reducing waste 
and improving efficiency. Sizing a heating/ cooling system for a home 
requires the same considerations.

How big is the house, how efficient is the thermal envelope, what is the 
local climate? You need to do an evaluation of the Btu requirements of 
the home... and as with renewable energy for electricity, and the first 
thing is ALWAYS improving the efficiency of the building first, which 
likely will enable you to put in a much smaller heating/ cooling system.

We dropped out homes heating needs by 60% just by adding insulation, 
better windows, insulated blinds, and changing to zone heating only 
during times of use. In our case this allowed us to easily heat a 1700 
sq ft home with a 28K Btu, air sourced heat pump during the coldest of 
our winter temperatures.

Todd


Jeremy Page wrote:

>--------------------
>
>Date: Thu, 24 Nov 2005 08:47:17 -0500
>From: conradg at cape.com
>Subject: Re: DC heat [RE-wrenches]
>
>
>
>Does anybody have any experience/recommendations for residential size 
>groundwater heat tranfer heat pumps?
>Conrad
>Cotuit Solar
>
>  
>

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