Question

find out HVAC formula ducting​

Answer 1

Cubic Feet Per Minute = (HVAC Unit Tons x 400) / total square footage of home.

Calculate for each individual room.

Next, we need to talk about the cubic feet per minute, or CFM. This measurement indicates the air velocity or flow needed to accurately heat or cool a room. Since the size of your ductwork can increase or lower this measurement, you’ll have to find the necessary CFM for each room before you can get the right duct size for each space.