Heating Help

heat loss calculation

What does it entail to conduct heat loss calculation?  In laymens terms please.

heat loss calculation

In effect, you need a floor plan of your home, door and window sizes, type and amount of glass, room sizes, ceiling height, type of construction and materials that with house is build with, thickness of walls and insulation, amount of wall area exposed to cold air, and other minor details.
Once all this information is gathered, you need to establish insulation and infiltration values and put all this info into a computer to calculate the heat loss of each room to determine the amount and/or size of the heat emitters, then you can determine how hot water is to be made and in what amounts, then you have to select your fuel source, size the boiler and related equipment and then decide how to pipe it and control it.
Not an at the kitchen table kind of project. Best left to a pro with a computer. That is as basic as I can explain it.