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Old 12-28-20, 07:55 AM   #14
solarhotairpanels
Helper EcoRenovator
 
Join Date: Mar 2012
Location: Warwick, Rhode Island
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Quote:
Originally Posted by WillyP View Post
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.
Willie, keep it simple / just go with glycol / proven liquid / no freezing
You'll be fine..
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Pat from Warwick, RI

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