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On demand H2O heater as back-up to solar water heater.

811 views 0 replies 1 participant last post by  jpointer 
#1 ·
Can I use an on-demand gas water heater as a back-up for a solar water heat exchanger to supply both a residential radiant heated floor and domestic hot water? This is a new, very well insulated residence in New Mexico's high dessert mountains (1800 square foot adobe home at 6300 ft elev.)
 
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