Perform the heat loss calculation usmg the January Wintertime DeSIgn Iemperature tor West Vancouver of -9C for the above grade components. Below grade heat losses are more complicated, but here assume a ground temperature of +5C for assemblies in contact with ground. ' Total Heat Loss at design temperature = Conductive (Above +Below Grade) + Convective Heat Losses ' Conductive Heat Losses: Q = U-A-AT (Where: (1 2 heat loss in W, U = Uvalue in W/mz- K, A = Area in m2, AT = temperature difference in \"C, separately for above and below grade) ' Air Leakage Heat Losses: (1 = 0.3-n-V-AT (Where: Q = heat loss in W, n = number of air changes per hour at average conditions/pressures, V = Volume of house in m3, AT = temperature difference in C)