Hello, I am working on a case in which i'm trying to calculate the heat load of a house (actually mine). I want to be sure that the calculations were done correctly during the design phase. Disregarding the methods at various web sites (most of which are commercial), i'm doing it in a scientific way. I'm kind of stuck at calculating "h", the coefficient of thermal convection. (Here i'm calculating h1 and h2. h1 is for the convection between interior of the house and inner surface i.e. the wall; h2 is for the convection between outer surface i.e. the wall and the exterior environment. I can't measure the temperature values at the inner and the outer surface which is the main problem. I can not use the correlations that uses Rayleigh and Grashoff numbers for the reason that i do not have the inner and the outer surface temperatures. I could not find any case studies. Am i following the wrong way here? Any help is greatly appreciated.