Supply Air Grille Sizing Chart

Duct system sizes and airflow quick chart created date.

Supply air grille sizing chart.

You may order a horizontal grille blades run in the long direction or a vertical grille blades run in the short direction. Supply air grille sizing chart. Air flow calculator linear bar grilles. This is critical if the grille is on the wall.

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. Supply grille sizing chart yoskin. You must order by the duct opening size width x height. First let s define some terms.

Grilles diffusers and a c accessories grilles diffusers and a c accessories ering piping and ductwork systems energy. Return a return draws air into a return duct system with negative pressure compared to the space usually via a fixed grille but. Grille length inches grille height inches please fill in either cfm cubic feet per minute value or fpm feet per minute value. If you are ordering a wall return air grille or return air filter grille please note that these are directional.

First calculate the percent of outside air compared to system airflow by dividing the outside air cfm by the total supply airflow. Should the system have an outside air intake you must reduce the amount of required return air into each return grille and duct to provide for the outside air entering the return side of the fan. Use the calculator below to quickly and easily determine the grille airflow.