Flex Duct For Return Air

Can be easily cut to size.

Flex duct for return air.

For most systems the minimum duct size see table 1 is sufficient for up to 25 feet 8 m with no more than three 90 bends. This additional insulation provides greater thermal efficiency to save energy. If the supply ducts are in the floor then the return air should be located up high. Most technicians are skeptical about these numbers especially on the return air side of the system.

Duct size single return as for any duct size is dependent on duct length air flow and allowable static pressure drop. These flexible duct products are designed to remain mold and mildew free throughout their lifespan. The master flow 4 in. But if its a return air duct that last answer is wrong if its the only return air run into the unit you need at least a 12 duct.

All ducts whether rigid or flexible should be sealed with ul 181 rated duct mastic. The duct board return air box is an r6 the duct board return air box is an r6 insulated box that installs traditionally in a ceiling. Flex ducts can be used for heating ventilating and air conditioning systems in both residential and commercial applications. The return air vent openings need to be on the opposite side of the room so the conditioned air is pulled across the room.

They are light weight fully insulated and easy to install. The duct has r6 insulation which contains 33 more insulation than the standard r4 2 product. 10 or 8 will starve the unit and cause it to freeze up which will. Can accept any size collar up to 18 in.

Insulated flexible duct r6 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications. Our website offers a variety of residential flex ducts air connectors and sleeves manufactured by hart cooley. Item 1790033 model 1790033. Used as a central return vent box filter grill not included.

When ducts are located outside the conditioned space they should be sealed to prevent loss of conditioned air and also insulated to prevent thermal loss or gain from the ambient air. This pulls the air across your body. Duct tape has many uses but sealing ducts isn t one of them. Lambro rigiflex 4 in x 96 in aluminum semi rigid flexible duct.

The other answers are right go to the the hardware store and get a bag of flex duct. For instance a 2 5 ton system approximately 400 cfm per ton would require 2 14 flexible return ducts or 1 very short flexible 18 duct to move the 1000 cfm required by the 2 5 ton system.