[Greenbuilding] HEAT PUMP WATER HEATER

[Alan Abrams]

need help quantifying the (presumed) benefit of using a heat pump water
heater for a new, airtight house, passive house insulation and glazing.
There is no natural gas serving the site.

the cooling load is very low--the house is surrounded by tall trees--but it
will have a Wash DC latent load.   The trees compromise the potential of
solar thermal...

...so the question is, does the efficiency and modest dehumidification
capacity of a HP WH offset the extra heat load, compared to either a
straight elec resistance WH, or bringing in propane service?

-a


Alan Abrams*
**certifed professional building designer, AIBD
certified passive house consultant, PHIUS**
**Abrams Design Build LLC*
*design for purposeful living*
6411 Orchard Avenue Suite 102
Takoma Park, MD 20912
office  301-270-NET- ZERO (301-270-6380)
fax      301-270-1466
cell     202-437-8583
alan at abramsdesignbuild.com
www.abramsdesignbuild.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/greenbuilding_lists.bioenergylists.org/attachments/20121002/43808f79/attachment.html>