Definitions for "RELATIVE HEAT GAIN"
An attribute which describes the total performance of the glazing with regard to thermal heat transfer (U-Value), as well as solar gain (shading coefficient). The relative heat gain predicts how much total energy will be gained through each square foot of glazing. The total heat gain through the glass for a specific set of conditions. The value is represented in BTU/hr x ft squared.
The amount of conduction heat gain plus solar heat gain, measured in terms of energy units per hour per square (compare U-Value). (Btu/hr/sq. ft. or W/m squared)
The amount of heat gain through a glass product taking into consideration the effects of solar heat gain (shading coefficient) and conductive heat gain (U-value).