Flexible Duct Flex Duct Calculator

Based on duct diameter.

Flexible duct flex duct calculator.

Our easy to use duct calculator application allows hvac installers to determine the best flexible duct size recommended for their installation project. Flexible duct calculator contents. Maximum recommended supply velocity. 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.

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. These materials are two completely different surfaces. Enter friction loss inches of water duct airflow cfm duct length and the number of bends. Friction loss calculator for flexible ducts.

We have been using the thermaflex flex duct for over 10 years. The calculator assumes the duct is installed in the uncompressed condition. Rectangular duct is rounded up to the nearest 1 4 inch. Click calculate and you will see the size of flex duct you need for that room.

Enter friction loss per 100 of duct inches of water duct airflow cfm duct length and the number of bends. Based on friction loss. 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. 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.

Based on friction loss. This calculator is intended for use with all quietflex flexible ducts. Flexible duct friction loss calculator 1. Thermaflex is the global leader in the flexible duct product industry for both commercial and residential hvac applications.

Input the required cfm in the box below that. 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. When you size flexible ducts with a sheet metal duct calculator low airflow and high static pressure are sure to follow. Use the online duct calculator see references and calculate the needed flex duct size.

Equivalent duct calculator round vs rectangular. Select the duct type on the pull down menu. Equivalent round duct diameter. Other hart cooley mobile tools.

Minimum friction loss will only be obtained when the duct is properly installed.