Ventilation Air Duct Air Vent Valve Grille Square Ceiling Diffuser for HVAC

Yes, the central core is designed to be easily removable. This feature greatly facilitates on-site commissioning after installation, as well as future access to the ductwork for cleaning and maintenance without needing to remove the entire diffuser.

Yes, certainly. Square ceiling diffusers can be used for both supply and return/exhaust air applications. When used for return air, they function similarly by connecting to the ductwork via the neck to effectively collect and exhaust room air.

We offer standard matching sizes. For example, a 150x150mm neck corresponds to a 300x300mm face; a 225x225mm neck corresponds to a 375x375mm face. This design ensures the diffuser fits perfectly with standard ceiling grid modules. Please refer to our product specification sheet for the complete size chart.

There are three main points: First, ensure the ceiling cutout is accurately sized. Second, the connection between the diffuser neck and the ductwork must be well-sealed to prevent air leaks. Third, ensure the diffuser is installed level to avoid tilting which could negatively impact air distribution.

Routine cleaning is simple: just use a soft cloth or vacuum cleaner to remove surface dust periodically. For a deeper clean, you can remove the central core, wash it with a mild detergent, let it dry completely, and then reinstall it. We recommend routine cleaning every 3-6 months.