Most Guys Back Into the loads they want, so that's the same thing
Originally Posted by MM#7
hey tech,hows michigan? any way, a heads up! on this board, they don't like the word rule of thumb! just lletting you know!
Truth is, on old houses you don't know the key assumptions that drive the loads, it is impossible with out testing. Since we really have no clue with out testing what these values are, we learn to use values for ACH, and Duct loss/gain in our load calcs that give us the "rule of thumb" answers we started with. Kinda silly but them's the Facts.
It's been that way for ever.
Houses very widely by Age, What Builder, Exposure to Wind, What day of the week they built, etc,,,
Ask you ACCA certified trainer. One thing they will tell you is 2 Stage units cover a lot of sins.