Heat pump water heater and PHPP modeling

[Glenn Haupt]

Hi All,

 

Anyone out there willing to provide some insight on modeling a GE Heat pump water heater in PHPP?  The GE website publishes 1856 kwh/yr of electricity usage and has an energy factor of 2.35, which I'm hearing is an overestimate of real performance.  The Energy Star program allows a 1.5 EF for the unit.   

 

Any input is welcome.

Thanks,

Glenn Haupt · Certified Passive House Consultant

Solar Craft Design · Bend, OR

voice:   541-610-7351

email:  solarcra...@gmail.com

blog:    passivehousewallawalla.blogspot.com

[Graham S. Wright]

I was just looking into that:

http://wrightonsustainability.com/?p=105

-gw

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[Glenn Haupt]

Thanks Graham! 

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[Adam Cohen]

Graham Wright has some up to date data on usage

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Adam Cohen
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[Martha Rose]

I believe that the utility companies have studied actual electrical consumption of the heat pump hot water heaters. The reason is that when I spoke with the City Light rebate person, she quizzed me heavily about which hot water heater I was choosing (Air Generate), where it would be installed (conditioned crawl) and how I was dealing with the cold air (ducting it to the outdoors). She said that the Air Generate and the AO Smith were the only 2 that were performing to a standard that warrants a rebate and only then, if they were installed properly. I passed her acid test to qualify, but we aren't installed yet. 

During the National Solar Tour, I spoke with a person from Tacoma Power. He, too, was well-versed in real-time performance of equipment. They get paid to learn all of this stuff.

Hope this helps.

Martha

We are approaching net-zero in Seattle!

www.CityCabins.com

 

Martha Rose Construction, Inc.

206-784-0147 office

206-406-4395 cell

[Graham S. Wright]

Yeah I included some data from bonneville power in my talk. 

Sent from my iPhone