Please Note: All information provided in this document is to be used as a guideline only.
The duct sizes listed in the chart provided are based on a fraction drop of .10 inches per 100 feet of lineal duct. This "Equal-Friction" method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications. Larger volumes or higher static pressures should be dealt with on an individual job basis.
Example: Ductwork Design Layout (With CFM Ratings)
This system is designed to move 3 Tons of Air Conditioning or 1200 CFM.
