Radiant buffer tank temp

Discussion in 'Radiant Heating and Cooling' started by ChrisJ, Feb 5, 2011.

  1. ChrisJ

    ChrisJ Active Member Forum Leader

    Heat source: 4 Ton Hydro-Temp dual compressor,

    Basement zone: 30' x 40', 4- 300' loops 1/2"= 1200', 9" spacing for a few rows near foundation wall, then 12" spacing.

    Garage zone: 30' x 24', 2- 300' loops 1/2"= 600', all 12" spacing.

    In the basement we put vapor barrier, then 2" rigid insulation. Around the perimeter we put strips of insulation, tops cut at 45*. My first mistake (of probably many) was I didn't continue the strips of insulation across the openings for 2 sliding glass doors. I know, I know, heat goes to cold everytime. I was also told that people put more tubes closer together near doors.

    In the garage did the vapor barrier, then a different product for insulation, 1/2" rolled stuff the supplier said is used a lot. The thinner product worked well for me in regards to pitching the floor to the doors and meeting my driveway height, still have 4-5" thick slab.

    jrh wrote:"Your efficiency in heating mode will largely depend on what temperature water
    the radiant floor needs to meet the load. Radiant floors designed for 85- 100*f will have a great COP,one designed for 120*f will not perform as well".

    Can my load be determined by the info given? I don't know what temp my floor needs to meet the load. Room temp only 65*. Buffer Tank has a 90*F set point.

    Last edited: Jun 28, 2011
  2. engineer

    engineer Well-Known Member Industry Professional Forum Leader

    If you are comfortable during cold weather with a 90*F buffer, then you should be enjoying the benefit of high COP (efficiency)

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