Sorry to say nothing, but a few years ago I did a study on off grid and on grid houses and some had electric resistance water heaters and one with a Heat pump water heater. If I can find the data I will send. However, it varied a lot most the families were for 2 or 3 people The variation made it seem like my study was of little value. except for the family with a heat pump water heater used about 1/4 the electricity of the other.
On Wed, Mar 14, 2018 at 6:19 PM, <drake.chamber...@redwoodalliance.org> wrote: > Hello Wrenches, > > Is there a good way to estimate the power that will be consumed for > electric water per person per day? We are estimating the amount of power > that will be used by an all electric duplex, and the water heater amount > seems high. The current model we have claims 3493 kWh/ year per 26 gallon > tank will be consumed. With the two units, that would add up to 6986 kWh / > year for hot water, pushing the system size to humongous for a 1300 ft sq > building. > > Does that seem high? There will be a maximum of 2 people per unit. > > The owner is considering going to 115 V units with a 15 gallon tanks. I > think the smaller tank would help, but it would seem that the amount of hot > water consumed would be the main issue. > > How can we get a good estimate for a per person energy usage for electric > hot water? Any other suggestions are welcome. > > Thank you, > > Drake > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches. > org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > >
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