Furnace Cold Air Return Duct

If you had no return air in your room you would create a positive pressure.

Furnace cold air return duct.

That would then reduce the flow of conditioned air to that space. Can be easily cut to size. 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.

Do not return air from bathrooms and kitchens. Used as a central return vent box filter grill not included. These ductwork tips will help balance your air conditioning and heating 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.

Hvac ductwork sizing is critical for proper heating and cooling in every room. Product is knocked down for shipping and must be. That is why you need a cold air return image 1. 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.

Can accept any size collar up to 18 in. Have to get the air back to the furnace. Return air ducting is necessary in almost every room. An insufficient return system or one too large will reduce the efficiency of the heating and increase energy bills.

In addition its flexibility allows for easier installation in hard to reach areas. For the system to work you have to re circulate the air back to the furnace.