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using RadPad

Thanks for your input Hot Rod, I will consider smaller size tubing. My thought was "larger tube for lower resistance, pumping head and horsepower."
I heard back from Teal International. They said I was right; the factors should be .8 & .6 (not .08 & .06). In 10 years, no one ever commented on that before.
Thanks again.


  • Mitch Coffman
    Mitch Coffman Member Posts: 3
    RadPad, step 10 \"Total Tube Required\"

    Are the tube spacing factors (for 15" and 18" tube spacing) correct? It looks like they should .8 and .6 respectively. I just got my RadPad & am using it for the first time. Mine shows .06 for 18" and .08 for 15" spacing. Im find it hard to believe that a 5788 sq ft floor area ( a barn for very pampered horses) only needs 463' of 3/4" tubing. I tried contacting Teal Intl., but I haven't heard back from them yet.
    Roughly: 5788 sq ft, about 200 MBH heat loss, low temps for water and space being heated (a barn remember). Job is in New Jersey, winter design temp is 10F. This is my first radiant floor design. I don't want it to be my last because the system didn't work :-(
  • hot_rod
    hot_rod Member Posts: 22,151
    That' a loop length

    not total amount of tubing needed.

    I use .84 as the 15" factor. 5788 X .84= 4861 feet of tube. Call it 5000 feet of tube or 10- 500 foot loops to do the job 15" on center.

    Are you sure you want to use 3/4"? it's a bear to work with, especially if it's cold. 1/2" can run 300 foot loops.

    hot rod
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
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