Heat Transfer Coefficients (HTC)
Cooling: ex. 76 deg F room temp, 66 deg F surface
Floor = (76 deg F66 deg F) x 1.2 Btu/hr/sf * deg F = 12
Btu/hr/sf
Wall = (76 deg F66 deg F) x 1.4 Btu/hr/sf * deg F =
14 Btu/hr/sf
Ceiling = (76 deg F66 deg F) x 1.9 Btu/hr/sf * deg F = 19
Btu/hr/sf
Heating: ex. 70 deg F room temp, 84 deg F surface
Floor = (84 deg F70 deg F) x 1.9 Btu/hr/sf * deg F = 28
Btu/hr/sf
Wall = (84 deg F70 deg F) x 1.4 Btu/hr/sf * deg F =
20 Btu/hr/sf
Ceiling = (84 deg F70 deg F) x 1.1Btu/hr/sf * deg F = 15
Btu/hr/sf
In heating only, one can raise the
wall and ceiling temperature to increase the output. For
walls do not exceed a nominal 120 deg F and limit ceiling
temperatures to a nominal 95 deg F
Learn more about indoor environmental quality.
Heat Loss to Head Loss, The Principles of Radiant Design
