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Heat transfer plate options for 1/2"
Marvin007
Member Posts: 52
What are some of best heat transfer plate options available at the moment for 1/2" pex between joist radiant installs?
If it matters I think I am considering 4' or 2' lengths. What design seems to extract and spread the heat the best into 1-5/8" wood subfloor/underlay?
If it matters I think I am considering 4' or 2' lengths. What design seems to extract and spread the heat the best into 1-5/8" wood subfloor/underlay?
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Comments
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The 4' heavy duty plates made by Uponor or Viega are recommended. With a 15/8" subfloor you're at the limit of output for a staple-up application. I'd make sure you do a careful heat loss to make sure you won't need supplemental heating, which will depend on the climate and the insulation values of the home.3
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I'll have to double check my subfloor+underlay that was rough guess. It may actually be 1-3/8".
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You're still at the limit with 13/8" total floor thickness. Supplemental heat will usually be required in most northern climes.0
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We like these from Rehau:
Bob Boan
You can choose to do what you want, but you cannot choose the consequences.0 -
If this will be the primary heating, I would first do a room by room heat load calc. Mid to high 20’s for btu output, assuming no more r value over the floor like carpet or throw rugs.Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
hot_rod said:If this will be the primary heating, I would first do a room by room heat load calc. Mid to high 20’s for btu output, assuming no more r value over the floor like carpet or throw rugs.0
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Paul Pollets said:The 4' heavy duty plates made by Uponor or Viega are recommended. With a 15/8" subfloor you're at the limit of output for a staple-up application. I'd make sure you do a careful heat loss to make sure you won't need supplemental heating, which will depend on the climate and the insulation values of the home.
is the heat transfer between these 2 plates drastically different?
These are $20.50 CAD per 4’ plate retail at Andrew Sheret
https://www.uponor.com/en-ca/s/joist-trak-1-2-heat-transfer-panel-a5080500
These are approx. $2.25 a 4’ plate.
https://m.vevor.ca/floor-heating-mat-c_10381/100pcs-4-aluminum-radiant-floor-heat-transfer-plates-for-1-2-pex-tubing-p_010932034185?gclid=CjwKCAiA68ebBhB-EiwALVC-NkSivivMXtEoog1FczCzMiMAiMqRtc9udNUZcJrKwwmtcdka4M0tpBoCzLEQAvD_BwE
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Yes... there are 1/8" thick extruded plates and "beer can" plates. The extruded plates hold the heat and transfer the temperature to the floor much better. typically, you can run the water temperature lower w/ the extruded plates. It makes for a more efficient system.
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kcopp said:Yes... there are 1/8" thick extruded plates and "beer can" plates. The extruded plates hold the heat and transfer the temperature to the floor much better. typically, you can run the water temperature lower w/ the extruded plates. It makes for a more efficient system.
https://www.uponor.com/en-ca/s/joist-trak-1-2-heat-transfer-panel-a5080500
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These are the only plates I ever used.https://radiantdesignandsupply.com/productsthermofin
Whichever one you get, look at their engineering which will tell you the heat output of the plates at different water temperatures. Within limits, the lower the water temperature, the more you boiler will condense.Rummage through the Slantfin website for their Explorer heat loss program.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 slab1
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