Hvac Duct Calculator Chart
Include fittings in the duct tel enter either.
Hvac duct calculator chart. Read friction loss inches of water and duct velocity fpm. Convert rectangular duct to round equivalent. Enter round duct diameter.
Rectangular duct is rounded up to the nearest 1 4 inch. Sheet metal duct friction loss calculator. Based on duct diameter.
Calculations are for 60 f dry air at sea level from 5 to 3000 cfm approximately standard air which is 0 075lb da ft. Enter round duct diameter inches duct airflow cfm duct length and the number of bends. If ashrae 2013 is selected flexible roughness is 0 003 ft when straight and fully stretched tight at 0 compression adjusted at other compressions otherwise the.
Friction rate velocity friction rate. Read round duct diameter inches and friction loss per 100 of duct inches of water. Flex duct 05 on most metal duct calculator round metal pipe 06 on most metal duct calculators field duct sizing chart rectangular sheet metal duct 07 on most metal duct calculators duct size duct height net inside dimension in inches round duct size estimate.
Duct system sizes and airflow quick chart created date. Enter duct airflow cfm duct velocity fpm duct length and the number of bends. Read duct diameter inches and duct velocity fpm.