Design HVAC - Design Air Conditioning - Design of Air conditioning systems
- load calculation - Manual N - Commercial load calculation = HVAC ENGINEERS - HVAC CONSULTANTS
- ACCA Manual N Commercial load calculation - Manual D - Manual D calculation - Manual J & D Calculations
Heating and Cooling systems are designed around internal and external temperatures, the closest weather station and of couse the loads of the home.
Here is a link for nationally accepted design temperatures from Energy Star: