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¾" fir, ¾" plywood, ¾" floating floor. How to get the heat through.
Alan (California Radiant) Forbes
Member Posts: 4,214
This floor sandwich approaches R-3 and I'm wondering if it's possible to heat the space by either using good quality plates ala Radiant Engineering or possibly UltraFin. The rooms are not difficult to heat (~25 BTU's/sq.ft.) and there is another part of the house where tubing will be in the slab. I see a two temperature system.
Has anyone done something like this?
Has anyone done something like this?
8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab
Two btu per sq ft for degree difference for a slab
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Comments
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I guess something like warmboard is out? An extra 3/4" (plus weight) and a threshold.
Or of course radiant ceiling.
In my house I have a couple zones-underside tubing in plates, 3/4" ply, pad & carpet, max water 130 (which it never gets to with outdoor reset) and never had a problem
Part of one zone runs in wetbed for laundry room. Took a couple of tries with my heat gun to balance the manifold but works great.
I'm sure constant circulation would help.There was an error rendering this rich post.
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The RadPad shows 145 SWT to provide 25 but/ft with R-3.
Radiant Engineering had some design data on their website.Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
25 btu/hr sqft seems high for a radiant application. Thoughts on doing a combination of maybe some radiant wall along with floor or adding in some panel rads or radiant panel baseboard to work in conjunction with the radiant floor and required water temps? Kinda more of condtioned flooring/radiant application
There was an error rendering this rich post.
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I have been stuck with that scenario a few times, used extruded plates, think my max req temp here in Seattle was 140 at 20 outside. Not ideal temps but due to average odt being 47 I was still in condensing temps 95% of the time. What's your od design Alan?0
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Our outdoor design temperature is 36°F the last time I checked.8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab0
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