Furnace Cold Air Return Duct

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.

Furnace cold air return duct.

Hvac ductwork sizing is critical for proper heating and cooling in every room. If you had no return air in your room you would create a positive pressure. A furnace return system must collect all the air being put out by that system. Cold air returns are sized 1 5 times above the supply capacity to prevent negative pressure in the system.

Flexible duct can be installed in place of galvanized pipe in many applications if allowed by your local hvac codes. Do not return air from bathrooms and kitchens. Product is knocked down for shipping and must be. That would then reduce the flow of conditioned air to that space.

Return air ducting is necessary in almost every room. Can be easily cut to size. For the system to work you have to re circulate the air back to the furnace. 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.

Used as a central return vent box filter grill not included. That is why you need a cold air return image 1. 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.

These ductwork tips will help balance your air conditioning and heating system. Have to get the air back to the furnace.