Return Air Grille Sizes

4 ton unit x 144 square inches 576 squared.

Return air grille sizes.

Calculate the square root of the total. Free delivery with 45 order. Air intakes and outlets ventilation systems air intakes and outlets rules of thumbs. Look on the plate to see how many btu or british thermal units your furnace puts out.

Set your store to see local availability add to cart. The air grille and vent cover selection from grainger includes steel metal and wood return air grilles and vent covers. 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. White return air filter grille model e190rf 20x20 40 76 40 76.

1105 satellite boulevard suite 300 suwanee georgia 30024 local phone. It differs from a register because it does not have a damper to control airflow. Proper sizing of the return air filter grille is required for the furnace to function correctly. Particle diameter opening size.

4 way wall ceiling register model e104m 10x10 16 28. Step 1 open up the cabinet of your furnace to gain access to the service plate. 15 75w x 25 75h 4 7 out of 5 stars 187 39 99 39. Grilles the function of a grille is to pull air from a room to return it to the heating or cooling system.

We are after the ability to move 980cfm so you now divide this number by 400 fpm yielding 2 45 or 2 5. Return a return draws air into a return duct system with negative pressure compared to the space usually via a fixed grille but. Exclusive everbilt 10 in. 14 x 24 steel return air filter grille for 1 filter removable face door hvac duct cover flat stamped face white outer dimensions.

Homes will either have multiple small grilles throughout or a single large grille installed in either ceilings or walls. A return air grill should be sized for an air speed of 300 500 fpm feet per minute. First let s define some terms. 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.

Therefore your return air duct and grill size will be 24 by 24 inches. 400 fpm is the median air speed for this calculation. Particle diameter strainers and filters mesh size vs.