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Author Topic: max water temp going into concrete slab?  (Read 3962 times)

daveyjones

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max water temp going into concrete slab?
« on: April 26, 2011, 06:20:03 PM »
Hi, I am wondering what the max temps that are used in hydronic heating in a concrete slab. I assume I will need a tempering (mixing) valve from the woodboiler itself.
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willieG

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Re: max water temp going into concrete slab?
« Reply #1 on: April 26, 2011, 06:25:27 PM »
most say a max of 85 or so ...i run mine a little hotter 95 to 100 (i have ceramic tile on the floor and they seem to take it ok)

feels nice on the feet in the middle of winter.
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RSI

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Re: max water temp going into concrete slab?
« Reply #2 on: April 26, 2011, 07:13:21 PM »
I have heard 110-120.
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kjw58

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Re: max water temp going into concrete slab?
« Reply #3 on: April 26, 2011, 07:49:29 PM »
I'm heating a 32x48 pole barn with hydronic heat in the floor and I run the water in at 120-125.  Just finished up the 10th heating season with no issues, working great   :thumbup:
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rosewood

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Re: max water temp going into concrete slab?
« Reply #4 on: April 26, 2011, 08:16:36 PM »
i always heard 90 deg for radiant
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daveyjones

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Re: max water temp going into concrete slab?
« Reply #5 on: April 26, 2011, 08:40:50 PM »
Thanks for the input. This seems like a greatest resource on the web! Now I have spent over $2000 on propane last year.  I am considering an outdoor woodstove, due to the free firewood I have access to cutting. I am just wondering if I would be better off throttling the boiler operating temp down enough without a tempering valve. I'm just starting to draw up a diagram/schematic
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Gomer1

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Re: max water temp going into concrete slab?
« Reply #6 on: August 22, 2011, 09:08:39 PM »

I have heard too hot of water temp will ruin the floor from the ground up.....does anyone know if this is true???
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