[RE-wrenches] Water Heater Heat Pumps

[frenergy]

Dana,

        I am no expert with ground source heat pumps, but I suspect that the measurement you took was when the resistance heat strips were on, which will only be used very infrequently in a properly designed and operated GSHP system.  Despite that, GSHP can be used off-grid with the heat strips off, but add a couple more KWs to the array and insulate the heck out of the structure, plus I suggest a LPG back-up.  

        GSHP's are not a slam-dunk install.  It is very important to find someone that will take a careful look at the particulars of a job (house, climate zone, soil type, etc....) to be sure the final product is efficient in its operation, esp for off-grid.

Bill

Feather River Solar Electric


----- Original Message ----- 
From: "Dana" <dana at solarwork.com>
To: "'RE-wrenches'" <re-wrenches at lists.re-wrenches.org>
Sent: Tuesday, May 26, 2015 7:53 AM
Subject: Re: [RE-wrenches] Water Heater Heat Pumps


> What kind of power draw do you see on this unit? & what kind of duty cycle do you see for 2 people or 4 people?
> 
> I amp clamped a 1800 sqft house heat pump for DHW & house heat in full power and measured 4338 watts & have a rough time recommending heat pumps for off grid.
> 
> ----------------------------------------------------------------------------
> Dana Orzel 
> Great Solar Works, Inc -  NABCEP # 051112-136
> E - dana at solarwork.com  - Web - solarwork.com 
> O - 970.626.5253  C - 208.721.7003
> "Responsible Technologies for Responsible People since 1988"  
>  Please consider the environment before printing this email.
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> 
> -----Original Message-----
> From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Tom Lane
> Sent: Monday, May 25, 2015 3:59 PM
> To: re-wrenches at lists.re-wrenches.org
> Subject: [RE-wrenches] Water Heater Heat Pumps
> 
> Water heater heat pumps make excellent sense in a garage in HOT HUMID SOUTHERN CLIMATES and about 700 square feet of garage space is necessary AND you must run a condensate line like an air conditioner . DO NOT PUT THEM IN CLOSETS AND OR SMALL LAUNDRY ROOMS UNLESS YOU CAN VENT 700 square feet of unconditioned air space to them . They are noisy , but a garage in a humid hot southern climate is a good choice and with a time clock set for 11:00 AM to 4: 00 PM when the air in the garage is hot AND solar grid tied system is operating is a great strategy . GatorTom
> 
> Sent from my iPad
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