| Johnny, what Grady meant was that the SUPPLY water to the hydro-air coil doesn't wanna be much less than 140°. The air coming out the registers will feel uncomfortably cool when it's drafting around the room.
So, you will need to set some minimum temp for those coils.
The RETURN temps from the coils could still be pretty low ... probably low enough ... if you figure you will have at least a 20* temp diff across the coil, that means 120* water going back to boiler. __________________
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