Quote:
Originally Posted by randen
I would also suggest for space heating with a concrete floor to install a dedicated in-floor loop which will carry the heated fluid directly from the panels to the floor this way you will have no losses from heat exchangers.
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I am not sure that, in a small cabin, losses from heat exchangers need be much concern. Assuming the heat exchangers are in the living space any losses from them will be heat put into the living space which is the goal anyway.
I have a solar contribution to my space heating and I really don't worry about heat losses from my heat exchangers heating the house directly rather than feeding into the heating system.
I think a direct in-floor loop is probably a good idea because it is the simplest & cheapest approach, not because it avoids heat exchanger losses.