Flex Duct For Cold Air Return

Flexible duct can be installed in place of galvanized pipe in many applications if allowed by your local hvac codes.

Flex duct for cold air return.

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. Insert the metal collar press the flower pedal shaped leaves to hold the collar in place. In addition its flexibility allows for easier installation in hard to reach areas. Figure 10 inch or 8 inch for a return.

All ducts whether rigid or flexible should be sealed with ul 181 rated duct mastic. Most technicians are skeptical about these numbers especially on the return air side of the system. Plus the knock down design simplifies transporting to the job by taking up very little space. Unbalanced air flow can increase air leakage from outdoors as well as force heated air outside of your house.

That is why you need a cold air return image 1. If you had no return air in your room you would create a positive pressure. If you live in a home that has rooms that are either too hot in hot weather or are cold in cold weather you could have a return air duct issue. Use a circle cutter and cut out a hole in your return box.

The flexible design allows for connection of a new or existing side air return on either side based on the placement of the reinforced sheet metal panel of the return air box assembly. Menards offers a wide range of ductwork pipe and fittings to help your ductwork systems run efficiently these products are used for warm air return supply and exhaust systems. The duct has r6 insulation which contains 33 more insulation than the standard r4 2 product. Insulated flexible duct r6 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications.

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. The master flow 8 in. That would then reduce the flow of conditioned air to that space. One way to help combat this problem is to modify your cold air return ducts for better airflow.

For the system to work you have to re circulate the air back to the furnace. Yes if your house is either hot or cold i ll bet you have inferior or lacking return air ducts. Return air ducts are necessary for just about every room.