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Old 08-04-20, 02:41 PM   #11
WillyP
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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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Old 08-05-20, 01:44 PM   #12
WillyP
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Quote:
Originally Posted by randen View Post
WilliP

Yes we have done the hydronic heated floors powered with 280 sq ft of flat plate. We live in Canada were the winter weather is harsh. Depending on the sun we have more than 50% of our space heating for the season.

I caution the use of oil for heat storage as it lends itself to environmental hazard and the system you are describing is full of net losses.

Water is hugely better at storage and heat transfer. Much safer with the addition of propylene glycol for antifreeze. (food grade). you can drink it!! if it leaks into the environment no harm!!!!

If you are interested I can provide you with first hand experience to my system that has proved itself.

Randen
I would love to hear some first hand experience information. By "flat plate" are you talking about a box with tubes in it?
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Old 08-06-20, 06:10 AM   #13
AzurePower
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Sound good

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