Residential duct sizing guide the following duct sizes are based on a fraction drop of 10 inches per 100 feet of lineal duct.
Round hvac duct sizing chart.
Duct system sizes and airflow quick chart created date.
Include fittings in the duct tel enter either.
Flex duct has a higher pressure drop and as such may require the size shown on this guide be increased by 1 round size for up to 800 cfm and 2 round sizes.
To insure proper distribution of air volume dampers must be used for all branch runs.
This equal friction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications.
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.
In wg duct tel.
Larger volumes or higher static pressures should be dealt with on an individual.
Friction rate velocity friction rate.
The chart should not be used to design complete duct systems.
Convert rectangular duct to round equivalent.
Download free duct sizing chart pdf according to ashrae standard.
The chart is based on metal duct.