ducted system heat-load calculation

https://easypdfshare.com/s/APuStATZC8pN1mrZQWRyB

When I'm calculating the heat load for a ducted system, I start by measuring the air volume flowing through each duct, then consider the temperature difference between supply and return air. It's surprising how much heat gains from sunlight, equipment, and people affect the overall load. I always double-check insulation values and duct leakage rates, since even small losses can throw off the entire balance. Getting this right is what prevents oversized equipment and keeps indoor temperatures co…