Flexible Ac Duct Installation

Insulated flexible duct r6 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications.

Flexible ac duct installation.

Cut the flex duct to the. Roll back the plastic or foil jacket and the fiberglass lining approximately 8 to 12 inches from the inner core. 4 4 installation and usage install ducts fully extended. Flexible ductwork is a very popular because it is easy to install and has great insulation potential.

Follow the manufacturer s instructions but in case they get lost here is a list of best practices for supporting ducts. Measure the distance between the plenums or collars where the flexible duct installs. The master flow 4 in. Flexible duct performance in stallation standards 5th edition figure 8 correct.

Space supports no more than 4 feet apart a connection to a rigid duct or to equipment counts as a support point. Some kinds of flexible ductwork can also be made from vinyl insulation which is extremely easy to fit on your own. The straps that hold up the flex duct need to be no less than 1 5 wide. Flexible duct needs to be larger than pipes to allow the same amount of airflow.

The supports need to be at the manufacturer s recommended spacing but no longer than 4 maximum. Installation of flexible ducts shall be listed and labeled to standard ul 181b closuresystemsforusewithflexibleairductsandairconnectors non metallic fastenersarelimitedto6inchw g maximumpositivepressure. Do not install in the compressed state or use excess length as this will noticeably increase friction losses. The most typical duct replacement cost range of 175 400 per duct includes removal of old duct and supply register installation of the new flexible or metal duct labor costs and disposal of all old materials.

Flexible duct can degrade over time. There s no question that flexible duct is easier to install than metal ductwork but consider this. Supports should be at least 1 inches wide. How to install insulated flex duct 1.

Minimum 1 duct diameter bend radius reduces pressure drop and improves air flow. Spread a thin layer of mastic. The duct has r6 insulation which contains 33 more insulation than the standard r4 2 product. The adc standards give a lot of other details about installation including one of the most important aspects the connections.