2015 - Higher Efficiency Water Heaters

[Mikesolar]

Originally Posted by SDMCF

I don't follow that, but maybe it is climate-dependent. Here, in winter, my attic could be over 50C colder than my house, so putting the water heater there would be crazy.

These are mostly in the southern US where there is often no basement and it doesn't get too cold. I personally think it is silly to have any mechanical equipment in an attic space unless it is within the building envelope (and then, only the cooling air handler).