It's been a while now since I had a heat load test done on my house and among other things they measured the living space volume (length, wide, height of each room), measured windows, took a stab at insulation values, estimated age of windows and doors and construction, ran it through some modelling software, and poof out came some heating and cooling capacity numbers.

Can anyone give this poster some idea what should be measured on a heat load test, so that if someone comes over to do it the poster will have some idea if its being done right?