Return Filter Grille Cfm Chart

D minus 2 3 4 d heavy guage steel construction concealed hinges equipped with filter retainers uses 1 nominal disposable filters finish.

Return filter grille cfm chart.

The most common place you will find furnace filters are either in the unit or in the return air ductwork right next to the unit. Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. Return a return draws air into a return duct system with negative pressure compared to the space usually via a fixed grille but. First let s define some terms.

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 8x8 9x7 10x6 13x5 17x4. It s a 1600 cfm system with 200 cfm of outside air 200 1600 12 5 of outside air. Then subtract the percent of outside air from each return air grille airflow in the system as calculated above to find the required adjusted return airflow. Air intakes and outlets ventilation systems air intakes and outlets rules of thumbs.

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. Table 4 2 return air duct installation sizes based on 05 inches of pressure drop per 100 ft round duct rectangular duct cfm dia. Situations may arise where you want or need to install the filter at the return air grille. This comes in handy if your furnace is in an attic or otherwise hard to access area.

Today truaire services its nationwide network of customers from five strategically placed distribution centers. Particle diameter opening size. 1 5 8 c minus 2 3 4. The return air grill will also usually have a filter inside it to trap particulate matter and other contaminants in the atmosphere of your dwelling.

Particle diameter strainers and filters mesh size vs. A return air grill will also look similar to the supply side grill and can only be differentiated by the flow of the air. You determine a return grille pressure zone required 340 cfm of return. Truaire a leading hvac register and grille manufacturer began operations in 1984 our first location was a 35 000 square foot warehouse in vernon ca.

Return filter grille specification chart.