Cold Air Return Ductwork

4 ton unit x 144 square inches 576 squared.

Cold air return ductwork.

Cold air returns in order for your ductwork system to operate properly the furnace must have a consistent source of air that is cycled back into the unit. During cold weather gas burners create heat in the heat exchanger image 2 which in turn heats the air. Return air ducts are necessary for just about 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. Item 1790033 model 1790033. 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. For each cubic foot of air that is pumped out into your home the same amount must be drawn back in so the process can start over.

The conditioned air then re circulates back into the system as needed. Running a metal cold air return duct between studs requires knowledge of both hvac systems and the components involved in framing. Therefore your return air duct and grill size will be 24 by 24 inches tip. The hot air goes up into the plenum and from there flows to the supply trunk line image 3 where it is distributed through vents throughout the rest of the home.

They do precisely what the name implies. Flexible duct can be installed in place of galvanized pipe in many applications if allowed by your local hvac codes. Return cold air from registers to the furnace so that it will run properly. Can be easily cut to size.

The square root of 576 is 24. Can accept any size collar up to 18 in. 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. Step 4 calculate the square root of the total.

Diameter of duct x 3 14 return air duct in square inches. 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. A furnace return system must collect all the air being put out by that system. Return vents also provide air circulation.

Product is knocked down for shipping and must be. A cold air return vent is necessary for optimal functioning of your heating system. Lambro rigiflex 4 in x 96 in aluminum semi rigid flexible duct. Every building that uses forced hot air for heating will have cold air return vents.

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.