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