If you are doing a replacement or new, anything 55 gallons and below is just extra insulation and slightly more efficient heating (and slightly larger size). Above 55 gallons, the mandate is basically new technology. I work only off the grid, and heat pump electric uses as much energy as a full size refrigerator, not an option (unless maybe with a timer as suggested in this thread, and a large PV system). The gas side of the mandate is condensing heaters that recover waste flue heat; we already have those on the on-demand side. Hopefully the SWAT teams can do double duty and seize toilets that use too many gallons per flush also.
Dan Fink Buckville Energy IREC Certified Instructor™ for: ~ PV Installation Professional ~ Small Wind Installer NABCEP / IREC / ISPQ Accredited Continuing Education Providers™ 970.672.4342 On Tue, May 26, 2015 at 3:35 PM, Tom Lane <t...@ecs-solar.com> wrote: > The water heater heat pump tanks , I am referring to are ONLY FOR HEATING > DOMESTIC HOT WATER for washing clothes , showers , baths , and dish washing > . On April 15 the Feds mandated all new standards for water heaters , ALL > ELECTRIC AND GAS HOT WATER HEATERS ARE NOW ABOUT TWO INCHES IN DIAMETER AND > SIX INCHES TALLER that were MANUFACTURED AFTER THAT DATE . All 66 , 80 and > 120 gallon electric water heaters were OUTLAWED except for Solar Hot Water > Tanks and 80 gallon water heater heat pumps are allowed . The normal size > 30 , 40 , and 55 gallon electric and gas water heaters are now wider and > taller ! Water heater heat pump tanks are usually 55 or 50 gallons or 80 > gallons and have a heat pump only , hybrid ( heat pump and electric ) , > electric only and off modes - for vacation . The idiot Feds think they > should be used all over the USA , however , my research , sez to only use > them in hot humid climates in garages ( which they will cool and dehumidify > ) in climates in the h > ot humid south and East Texas . Do your own research , or look at the > research done at the Florida Solar Energy Center . GatorTom PS : rumor has > it that the Feds may rescind the order from their hot water Czar on 80 and > 120 gallon electric water heaters ! Or maybe they will send SWAT teams > into plumbing supply houses to check on that and also their outlawing brass > fittings with tiny amounts of lead . > > > Sent from my iPad > _______________________________________________ > 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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