Return Air Filter Grille Sizes

Calculate the square root of the total.

Return air filter grille sizes.

Therefore your return air duct and grill size will be 24 by 24 inches. We sell both stock size as well as custom made rectangular grilles and registers as well as stock round registers for both supply and exhaust applications. A return air grill should be sized for an air speed of 300 500 fpm feet per minute. Since from this example the furnace requires 400 square inches for your filter grille you may use either the 25 by 16 filter grille or the 20 by 20 filter grille.

The square root of 576 is 24. D minus 2 3 4 d heavy guage steel construction concealed hinges equipped with filter retainers uses 1 nominal disposable filters finish. Hart cooley llc. Se grand rapids mi 49512.

The most common furnace filter sizes are 10 x 20 14 x 20 16 x 24 18 x 30 12 x 12 14 x 24 16 x 25 20 x 20 12 x 20 14 x 25 18 x 18 20 x 24 12 x 24 14 x 30 18 x 20 20 x 25 12 x 30 15 x 20 18 x 24 20 x 30 12 x 36 16 x 20 18 x 25 4 x 24 and 25 x 25 and these sizes. 190 stamped 1 2 blade spacing fixed hinge return air filter grille. Return a return draws air into a return duct system with negative pressure compared to the space usually via a fixed grille but. Made to order grilles and registers.

Air intakes and outlets ventilation systems air intakes and outlets rules of thumbs. 1 5 8 c minus 2 3 4. Showing all 4 products. Some of the common sizes include 20 by 14 25 by 16 and 20 by 20.

Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. Return filter grille specification chart. 673 steel return air filter grille 1 2 fin spacing. Particle diameter opening size.

Particle diameter strainers and filters mesh size vs. 400 fpm is the median air speed for this calculation. We are after the ability to move 980cfm so you now divide this number by 400 fpm yielding 2 45 or 2 5. Submittal data 55 kb pdf engineering data 177 kb pdf engineering data free area chart 49 kb pdf.

4 ton unit x 144 square inches 576 squared. 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. Return air filter grilles. First let s define some terms.

5030 corporate exchange blvd. 190rf series stamped 1 2 blade spacing with. All of our dayus grilles are cut to size aluminum construction rustproof and only 40 weight versus steel. Using those examples you would see their square inches are 280 400 and 400 respectively.

P 800 433 6341 f 800 223 8461 map. 190 perfomace data 190 series submittal drawing.