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SNOWMELT DESIGN BUILD

John_21
John_21 Member Posts: 34
in THE MAIN WALL
may have had an influnce on the numbers. John

Comments

  • richard lampson
    richard lampson Member Posts: 10
    SNOWMELT DESIGN BUILD

    RECENTLY A DESIGN BUILD SNOWMELT JOB CAME UP TO BID. THIS JOB WAS A CLASS II TYPE JOB IN SOUTH LAKE TAHOE CA, 6200' ELEVATION. APPROX 20,000.00 SQUARE FEET, 32,000 FT 3/4 TUBING. THE BTU LOAD BETWEEN THE FOUR BIDDERS RANGED FROM
    ABOUT 200 BTUS PER SQUARE AT THAT ELEVATION TO 300 BTUS PER SQUARE FOOT AT 6200' WITH AN 80% EFF APPLIANCE.TUBE WAS ON 10" CENTERS. WHY THE WIDE RANGE?









  • Amir Amir - Slant/Fin Corp.
    Amir Amir - Slant/Fin Corp. Member Posts: 12


    Based on experience, the load per sq-ft depends upon various parameters, such as snow fall rate, % of surface you want to be totally free from snow/ice, response time etc. Also, it depends a lot upon the type of control system you have ( either fully automatic or manually operated ) .

  • Jed_2
    Jed_2 Member Posts: 781


  • Jed_2
    Jed_2 Member Posts: 781


  • hot_rod
    hot_rod Member Posts: 23,816
    Within the latest ASHRAE

    snowmelt classifications are some choices. While there are still three classes, they also have various percentages of snowfall melt included. So it's possible that various class 2 calcs could present a spread in btu/ sq. ft loads depending on the % chosen.

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