Furnace Cold Air Return Duct

Hvac ductwork sizing is critical for proper heating and cooling in every room.

Furnace cold air return duct.

Have to get the air back to the furnace. Flexible duct can be installed in place of galvanized pipe in many applications if allowed by your local hvac codes. If the furnace is putting out 1 000 cubic feet per minute of air flow the return system must collect 1 000 cubic feet and take it back to the unit. In addition its flexibility allows for easier installation in hard to reach areas.

Cold air returns are sized 1 5 times above the supply capacity to prevent negative pressure in the system. Used as a central return vent box filter grill not included. Product is knocked down for shipping and must be. For the system to work you have to re circulate the air back to the furnace.

That would then reduce the flow of conditioned air to that space. Can accept any size collar up to 18 in. Do not return air from bathrooms and kitchens. That is why you need a cold air return image 1.

A furnace return system must collect all the air being put out by that system. Metal and flexible ductwork need to be sealed to guarantee that it is reasonably air tight for maximum efficiency use an approved foil tape or duct sealant. 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 board return air box is an r6 the duct board return air box is an r6 insulated box that installs traditionally in a ceiling.

An insufficient return system or one too large will reduce the efficiency of the heating and increase energy bills. If you had no return air in your room you would create a positive pressure.