What is Grilles?
Grilles are vent covers used for air intake, exhaust, or supply applications.
Definition
Purpose
Grilles help move air through a building while giving the HVAC system some control over the direction and amount of airflow. They can be used for Return Air, Supply Air, or exhaust, depending on where they are installed.
Return Grilles bring room air back into the HVAC system, while supply grilles deliver conditioned air into the space. Their design also affects how air enters or leaves the space.
Different types, such as Supply/Deflection Grilles, linear bar grilles, and Eggcrate Grilles, are used based on airflow needs and the appearance of the space.
Examples of Use
- A return grille in an office collects room air and sends it back through the HVAC system.
- A supply grille directs conditioned air into a room and can be adjusted to change its direction.
- A linear bar grille is often installed along walls or ceilings where a long, narrow opening works better with the room's layout.
- An eggcrate grille has a grid-like face and is commonly used for return or exhaust air.
Related Terms
Notes
- Grilles are available with fixed or adjustable blades, depending on how much control over airflow is needed.
- Return Air grilles generally focus on allowing air back into the duct system, while Supply Air grilles are designed to direct air into the occupied space.
- The right grille depends on factors such as airflow, duct size, installation location, and the look required for the room.
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