Return Air Grille Sizes

We are after the ability to move 980cfm so you now divide this number by 400 fpm yielding 2 45 or 2 5.

Return air grille sizes. It differs from a register because it does not have a damper to control airflow. Exclusive everbilt 10 in. Proper sizing of the return air filter grille is required for the furnace to function correctly. Step 1 open up the cabinet of your furnace to gain access to the service plate.

Particle diameter opening size. Return a return draws air into a return duct system with negative pressure compared to the space usually via a fixed grille but. 15 75w x 25 75h 4 7 out of 5 stars 187 39 99 39. Exclusive everbilt 20 in.

The square root of 576 is 24. Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. Particle diameter strainers and filters mesh size vs. 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. 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. 4 ton unit x 144 square inches 576 squared. 1105 satellite boulevard suite 300 suwanee georgia 30024 local phone.

Free delivery with 45 order. Set your store to see local availability add to cart. Grilles the function of a grille is to pull air from a room to return it to the heating or cooling system. 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.

First let s define some terms. Homes will either have multiple small grilles throughout or a single large grille installed in either ceilings or walls. 400 fpm is the median air speed for this calculation. 14 x 24 steel return air filter grille for 1 filter removable face door hvac duct cover flat stamped face white outer dimensions.

The air grille and vent cover selection from grainger includes steel metal and wood return air grilles and vent covers. Calculate the square root of the total. A return air grill should be sized for an air speed of 300 500 fpm feet per minute.