Return Air Duct

A return air duct is what carries air back to the furnace after it is dispensed throughout the home through the supply duct.

Return air duct.

Used as a central return vent box filter grill not included. Most rooms must have a return duct. Product is knocked down for shipping and must be. Air from your rooms must get back to the furnace or air conditioner.

Can accept any size collar up to 18 in. If you had no return air in your room you would create a positive pressure. Return air ducts usually use ceiling joist spaces as the actual duct. Therefore your return air duct and grill size will be 24 by 24 inches tip.

Step 4 calculate the square root of the total. These ductwork tips will help balance your air conditioning and heating system. For the system to work you have to re circulate the air back to the furnace. Return air ducting is necessary in almost every room.

Diameter of duct x 3 14 return air duct in square inches. Nail a piece of sheet metal onto the back of a stud cavity. 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. 4 ton unit x 144 square inches 576 squared.

Have to get the air back to the furnace. That is why you need a cold air return image 1. The square root of 576 is 24. An air return duct is basically a concealed air passageway in a home or other building that acts as a channel for pumping air out of an enclosed room and into the air conditioning or central heating system these ducts typically start with vent grates in the wall on the ceiling or in the floor.

Without a return air duct the air would not properly circulate and your energy costs would rise.