Flexible Duct Flex Duct Calculator

Input the required cfm in the box below that.

Flexible duct flex duct calculator.

Other hart cooley mobile tools. Our easy to use duct calculator application allows hvac installers to determine the best flexible duct size recommended for their installation project. Equivalent duct calculator round vs rectangular. Thermaflex is the global leader in the flexible duct product industry for both commercial and residential hvac 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. Maximum recommended supply velocity. The calculator assumes the duct is installed in the uncompressed condition. Based on friction loss.

Use the online duct calculator see references and calculate the needed flex duct size. Friction loss calculator for flexible ducts. While a duct sizing calculator built for a specific type of ductwork is the best possible method for sizing ducts the attached chart can be used in most single story homes with a centrally located. Enter friction loss inches of water duct airflow cfm duct length and the number of bends.

This calculator is intended for use with all quietflex flexible ducts. Calculations are for 60 f dry air at sea level from 5 to 3000 cfm approximately standard air which is 0 075lb da ft. These materials are two completely different surfaces. 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.

Select the duct type on the pull down menu. Enter friction loss per 100 of duct inches of water duct airflow cfm duct length and the number of bends. Based on duct diameter. Unless it s stated on the front of the duct calculator that it is specifically for use with flexible ducts it s probably intended for use with sheet metal.

When you size flexible ducts with a sheet metal duct calculator low airflow and high static pressure are sure to follow. While this may be true in most cases for a metal supply air duct it is not for a metal return nor a 6 flexible duct on supply or return. Rectangular duct is rounded up to the nearest 1 4 inch. Flexible duct calculator contents.

For installation instructions refer to the duct package. Friction loss calculator for sheet metal ducts. Flexible duct friction loss calculator 1. Minimum friction loss will only be obtained when the duct is properly installed.

Equivalent round duct diameter.