Best source for domestic hot water?
Getting ready to build a LEED certified home, tight construction, excellent quality windows. Ground Source Heat Pump based HVAC. Will use excess heat from heat pump for hot water, but need a storage/booster tank. HVAC contractor wants to use standard resistance tank heater. Is this sufficient? How do I best find a highly insulated tank? Essentially no one in my area of the country (Northeast Indiana) is building like this. Heat Pump tank? My HVAC contractor says that a demand heater would be too expensive/relatively useless as the water coming from the heat pump should be more than sufficient most of the year, and the tank is justly used as an insulated reservoir. I have "just enough knowledge to be dangerous not helpful". When we first sat down with our architect, he said that "...building green was a series of difficult compromises". This house is, in part, to be a demonstration of what can/should be done, yet we do need to be somewhat practical. Yet we are trying to keep electrical loads as low as possible.
Posted May 9, 2014 7:04 PM ET
Edited May 11, 2014 4:57 AM ET
Other Questions in Mechanicals
Can unvented roof assemblies be insulated with fiberglass if I use rigid foam on the exterior of the sheathing?