Flex Duct For Return Air

If the supply ducts are in the floor then the return air should be located up high.

Flex duct for return air.

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. Used as a central return vent box filter grill not included. The return air vent openings need to be on the opposite side of the room so the conditioned air is pulled across the room. Most technicians are skeptical about these numbers especially on the return air side of the system.

All ducts whether rigid or flexible should be sealed with ul 181 rated duct mastic. The other answers are right go to the the hardware store and get a bag of flex duct. These flexible duct products are designed to remain mold and mildew free throughout their lifespan. Product is knocked down for shipping and must be assembled.

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. Can accept any size collar up to 18 in. This additional insulation provides greater thermal efficiency to save energy. Lambro rigiflex 4 in x 96 in aluminum semi rigid flexible duct.

Duct tape has many uses but sealing ducts isn t one of them. The master flow 4 in. The duct has r6 insulation which contains 33 more insulation than the standard r4 2 product. Cut through both layers with a razor knife and then the inner tube wire with some dikes or linesman pliers.

This pulls the air across your body. Can be easily cut to size. Supply air from furnaces and air conditioners should be on outside walls. 10 or 8 will starve the unit and cause it to freeze up which will.

Flex ducts can be used for heating ventilating and air conditioning systems in both residential and commercial applications. They are light weight fully insulated and easy to install. Duct size single return as for any duct size is dependent on duct length air flow and allowable static pressure drop. Insulated flexible duct r6 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications.

Item 1790033 model 1790033. Our website offers a variety of residential flex ducts air connectors and sleeves manufactured by hart cooley.