Quote:
Originally Posted by MN Renovator
...Even Daox has loop overkill for his serious window and high levels of insulation with 110f input temps...
|
I haven't actually talked this issue over with Daox, but it seems pretty clear that he is working on the principle that a highly efficient house, coupled with a highly efficient floor, means that sufficient heating can be achieved at very low feed temperatures.
That is at the core of 'low temperature heating'.
With fossil fuel, the difference in lowering feed temperatures a degree or two is pretty small.
With a heat pump, lowering the feed temp a few degrees makes a big change in efficiency.
With solar, it means that you can heat directly with solar heated water down to a lower temperature before you need to either extract more heat with a heat pump or else rely on a back-up heat source.
-AC