The terms grilles, registers, and diffusers are often changed interchangeably. While these three all serve the same general purpose – covering the ends of air ducts – they are functionally different. Local heat pump inspection and repair company J & M Air Conditioning & Heating discusses the differences between these three vent covers.
Grilles do not have moving parts and only function to let air pass through and can be used for air intake and exhaust vents. Some grilles can direct airflow in a fixed direction, which makes it ideal for air conditioning vents as cool air tends to flow downwards. The simple design makes grilles easy to clean and maintain. They also come in a variety of standard sizes, colors, and styles that make them easy to install and replace. Grilles are also installed on dividers between rooms that share an air conditioning system.
Registers are essentially grilles but with adjustable dampers in them. A damper is a mechanism that lets the user adjust the amount and direction of air that goes through a vent – or shut it off altogether. This makes registers ideal for feeding air into indoor spaces but not so much for air intake. While people often refer to air intake vents as “return registers,” they are likely referring to grilles rather than registers. In places accessible to the public like hotels and grocery stores, air conditioning service companies typically install registers in a fixed direction.
Diffusers are functionally similar to registers in that the amount of air that passes through it can be adjusted. However, instead of a singular direction, diffusers have dampers that release air all around. Most office HVAC systems have diffusers installed at the ceiling and are typically made of concentric squares or circles. Some diffusers are shaped like an eyeball that lets the user position the damper in a fixed direction when needed. Diffusers are effective when you need even air distribution in a room.
Call J & M Air Conditioning & Heating for Your HVAC Needs
J & M Air Conditioning & Heating can help you with your ductless or window air conditioner rain or shine. Give us a call at (951) 654-3464 or (760) 296-7075, or fill out our contact form to schedule an appointment. We serve customers in Hemet, CA, and the surrounding communities.