Return Air Grill Sizes

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.

Return air grill sizes. Step 1 open up the cabinet of your furnace to gain access to the service plate. Make sure to check out the large selection of hard to find return filter grilles. The last step is to size the return grille and duct to match the total of the supply registers. Wxh wxh wxh wxh wxh wxh wxh wxh 80 6x6 7x5 9x4 90 7x6 8x5 10x4 100 7 8x6 9x5 11x4 125 7x7 9x6 11x5 13x4 150 8x7 9x6 12x5 15x4 175 8.

Buy return air grilles in shop. Return a return draws air into a return duct system with negative pressure compared to the space usually via a fixed grille but. Application max recommended velocity m s return air grille at high level. First let s define some terms.

Particle diameter strainers and filters mesh size vs. An optional sheet metal frame is available for ease of removal and cleaning. Particle diameter opening size. Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more.

We are after the ability to move 980cfm so you now divide this number by 400 fpm yielding 2 45 or 2 5. Size mm max recommended air quantity l s 600 150. 400 fpm is the median air speed for this calculation. The grille is available in 2 sizes and 7 decorator colours.

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. Proper sizing of the return air filter grille is required for the furnace to function correctly. Table 4 2 return air duct installation sizes based on 05 inches of pressure drop per 100 ft round duct rectangular duct cfm dia. Size the return grille and duct to remove 340 cfm from the pressure zone according to your favorite duct sizing.

Look on the plate to see how many btu or british thermal units your furnace puts out. This is the required airflow through the return grille. One piece moulded adaptors are available for ceiling mounted applications or wall mounted where a suitable cavity exists. Wall vents and return air grilles find wall vents return air grilles over 80 sizes for walls and ceilings baseboard returns air deflectors wall clips and custom grilles.

Air intakes and outlets ventilation systems air intakes and outlets rules of thumbs. Slimline return air grille door grille sizing. The air grille and vent cover selection from grainger includes steel metal and wood return air grilles and vent covers.