Return Air Grille Sizes

A return air grill should be sized for an air speed of 300 500 fpm feet per minute.

Return air grille sizes.

Particle diameter strainers and filters mesh size vs. 14 x 24 steel return air filter grille for 1 filter removable face door hvac duct cover flat stamped face white outer dimensions. Proper sizing and orientation of grilles registers and diffusers may seem like such a simple thing but it s an area where confusion and mistakes are commonly made. We are after the ability to move 980cfm so you now divide this number by 400 fpm yielding 2 45 or 2 5.

It differs from a register because it does not have a damper to control airflow. Air intakes and outlets ventilation systems air intakes and outlets rules of thumbs. 4 way wall ceiling register model e104m 10x10 16 28. Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more.

4 ton unit x 144 square inches 576 squared. 15 75w x 25 75h 4 7 out of 5 stars 187 39 99 39. The square root of 576 is 24. Exclusive everbilt 20 in.

Therefore your return air duct and grill size will be 24 by 24 inches. Grilles the function of a grille is to pull air from a room to return it to the heating or cooling system. 400 fpm is the median air speed for this calculation. Find a decorative metal floor register that will match your home or office decor or go with a standard steel grille with white electro coated and powder coated finish.

Exclusive everbilt 10 in. Look on the plate to see how many btu or british thermal units your furnace puts out. Step 1 open up the cabinet of your furnace to gain access to the service plate. Particle diameter opening size.

1105 satellite boulevard suite 300 suwanee georgia 30024 local phone. Proper sizing of the return air filter grille is required for the furnace to function correctly. First let s define some terms. Free delivery with 45 order.

Calculate the square root of the total. Return a return draws air into a return duct system with negative pressure compared to the space usually via a fixed grille but. Homes will either have multiple small grilles throughout or a single large grille installed in either ceilings or walls.