Return Air Filter Grille Sizing Chart

Particle diameter strainers and filters mesh size vs.

Return air filter grille sizing chart. A 4ton requires 1600 cfm 300 is 5 33 sq. Feet of free open air filter area or ak. One thing to remember is that you must have enough supply vents vents blowing air out and return vents vent sucking warm air back in the air conditioner. Step 1 open up the cabinet of your furnace to gain access to the service plate.

Proper sizing of the return air filter grille is required for the furnace to function correctly. Hart cooley portal brand store view all brands promotions careers. You actually will never have too much return air filter area. 1 24 of 191 results for filter grilles page 1 of 8.

Particle diameter opening size. Hart cooley llc. P 800 433 6341 f 800 223 8461 map. Return a return draws air into a return duct system with negative pressure compared to the space usually via a fixed grille but.

1 5 8 c minus 2 3 4. Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. 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. 5030 corporate exchange blvd.

Se grand rapids mi 49512. Return filter grille specification chart. Rhf45 aluminum return air filter grille 45 degree fixed blade. 400 fpm is the median air speed for this calculation.

Manual d requires a maximum fpm velocity through a new clean filter of 300 fpm. Wrong filter area sizing has been a major problem since air conditioning was invented. We are after the ability to move 980cfm so you now divide this number by 400 fpm yielding 2 45 or 2 5. D minus 2 3 4 d heavy guage steel construction concealed hinges equipped with filter retainers uses 1 nominal disposable filters finish.

A return air grill should be sized for an air speed of 300 500 fpm feet per minute. Properly sizing and installing your air conditioning system are important in making sure your air conditioner operates efficiently according to the u s. First let s define some terms. Filter grille return air in white steel.

Look on the plate to see how many btu or british thermal units your furnace puts out.