heat loss through windows formula
Calculate the heat loss through one window by using the equation HL = WA x U x (Del) T. Substitute into the formula the values for WA = 1.80 m^2, U = 2.5 W/m ^2 deg C and (Del) T = 18 degrees C, you find that heat loss (HL) =1.80 m^2 x 2.5 W/m^2 deg C x 18 degrees C = 81 Watts.ecause air leakage or infiltration through windows can cause heat losses that may increase your heating bill during winter, these calculations can be important factors to consider for your homeâs energy efficiency.