08-14-2014, 09:25 AM
Heat Loss Coefficients
British Thermal Unit: Btu, the amount of heat needed to raise the temperature of 1 pound of water to 1 degree Fahrenheit.
Coefficient of Thermal Conductivity: k, the amount of heat, in Btu’s, transferred in one hour through 1 sq. ft. of a given material that is 1” thick and has a temperature difference between its surfaces of 1 degree Fahrenheit.
Conductance: C, the amount of heat that will flow through the material in 1 hour / sq. ft. of surface with a 1 degree Fahrenheit of temperature difference.
Resistance: R, the opposite of conductivity or conductance. A good insulation material will have a high R- value.
Total Heat Transmission: U, represents in Btu / sq. ft. / hour with 1 degree temperature difference for a structure which may consist of several materials or spaces.
British Thermal Unit: Btu, the amount of heat needed to raise the temperature of 1 pound of water to 1 degree Fahrenheit.
Coefficient of Thermal Conductivity: k, the amount of heat, in Btu’s, transferred in one hour through 1 sq. ft. of a given material that is 1” thick and has a temperature difference between its surfaces of 1 degree Fahrenheit.
Conductance: C, the amount of heat that will flow through the material in 1 hour / sq. ft. of surface with a 1 degree Fahrenheit of temperature difference.
Resistance: R, the opposite of conductivity or conductance. A good insulation material will have a high R- value.
Total Heat Transmission: U, represents in Btu / sq. ft. / hour with 1 degree temperature difference for a structure which may consist of several materials or spaces.