Ductulator Hvac Duct Sizing Calculator 1998

Convert rectangular duct to round equivalent.

Ductulator hvac duct sizing calculator 1998.

The ductulator duct sizing calculator is a hand held rotating calculator used for sizing supply and return duct systems using the equal friction design method. Sheet metal duct friction loss calculator. Includes scales for friction loss per unit length air volume air velocity round duct diameter and rectangular duct diameters. Air duct also termed as ductulator is a passage that is used to provide fresh air into rooms buildings etc air ducts may be in circular square and in rectangular shapes.

Unless within 2 the diameter is rounded up to the nearest inch. This free ductulator calculates the exact duct size round and rectangular for the given friction rate duct type and amount of airflow. Metal ductboard flex size by. Read round duct diameter inches and friction loss per 100 of duct inches of water.

This ductulator uses the colebrook equation to calculate the smallest duct size acceptable for the selected friction rate and duct type that stays within the selected acca manual d recommended velocities. Friction rate velocity friction rate. Rectangular duct is rounded up to the nearest 1 4 inch. This online air duct calculator is used to calculate the velocity of air flow feet per minute fpm and feet per second fps through any shaped circle square or rectangle ductulator with either diameter sides or area.

Include fittings in the duct tel enter either.