Flexible Duct Flex Duct Calculator

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.

Flexible duct flex duct calculator.

Enter friction loss inches of water duct airflow cfm duct length and the number of bends. Rectangular duct is rounded up to the nearest 1 4 inch. Maximum recommended supply velocity. We have been using the thermaflex flex duct for over 10 years.

Click calculate and you will see the size of flex duct you need for that room. When you size flexible ducts with a sheet metal duct calculator low airflow and high static pressure are sure to follow. Equivalent duct calculator round vs rectangular. Enter friction loss per 100 of duct inches of water duct airflow cfm duct length and the number of bends.

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. Other hart cooley mobile tools. Based on friction loss. Thermaflex is the global leader in the flexible duct product industry for both commercial and residential hvac applications.

For installation instructions refer to the duct package. Based on duct diameter. These materials are two completely different surfaces. Use the online duct calculator see references and calculate the needed flex duct size.

Equivalent round 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. Select the duct type on the pull down menu. Input the required cfm in the box below that.

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. Flexible duct friction loss calculator 1. This calculator is intended for use with all quietflex flexible ducts.

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. Flexible duct calculator contents. Minimum friction loss will only be obtained when the duct is properly installed. Based on friction loss.

The calculator assumes the duct is installed in the uncompressed condition.