Not true. Heatpump water heater heating at one third the electric energy cost still beats a tankless hands down.
The only time it wouldn't is when the house with tankless is unused for long periods. Plus, the heatpump waater heater can run from solar and cost another half and be emissions free. Bob -----Original Message----- From: EV <[email protected]> On Behalf Of Jay Summet via EV Sent: Thursday, July 26, 2018 9:48 PM To: [email protected] Cc: Jay Summet <[email protected]> Subject: Re: [EVDL] Charging load on the grid (NOT) On 07/26/2018 02:38 PM, Lee Hart via EV wrote: > 4. Tankless demand heaters (that only heat the water when it is > actually > needed) are more efficient that anything you can do with a tank-type > waterheater, regular or hybrid. Yes, when comparing gas tankless to gas tanked heaters. NO for Electrically operated tankless heaters vs hybrid (heat pump) water heaters with a tank. Most tankless heaters are gas as the electric ones require a MASSIVE service (24-27 KW, 100+ amps) to heat water instantaneously (via a restive element). Even with heat losses due to storage, the efficiency of an electrically operated heat pump for heating (4x or better than a restive element) will always beat an electrically operated restive heater. Jay _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
