Need help designing a solar water heater for radiant floor heat

WillyP · 08-04-20, 03:41 PM

I am absolutely interested. To be clear, I have no intention of running oil through the slab. I was going to use oil to go through the evacuated tube heater and into coils, inside the water tanks. My main concern was freezing at night, which is why I wanted oil not water. But pretty much everybody agrees this would be a bad idea, so I am leaning towards water and antifreeze.

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08-04-20, 03:41 PM	#10
WillyP Lurking Renovator Join Date: Jul 2020 Location: Virginia Posts: 27 Thanks: 6 Thanked 3 Times in 3 Posts	I am absolutely interested. To be clear, I have no intention of running oil through the slab. I was going to use oil to go through the evacuated tube heater and into coils, inside the water tanks. My main concern was freezing at night, which is why I wanted oil not water. But pretty much everybody agrees this would be a bad idea, so I am leaning towards water and antifreeze.