Square Ceiling Diffuser

Supply square ceiling diffusers are built with concentric aluminium cones providing quiet and efficient horizontal air distribution in 4-way, 3-way, 2-way and 1-way discharge patterns. Standard sizes 150x150, 225x225, 300x300, 375x375 and 450x450 mm with performance data per pattern including neck size, Ak, neck velocity, pressure drop, cfm, throw and NC. Accessories: opposed-blade damper (OBD) with overlapping lips for tight closure, spring-clip attachment, lever-operated option and PVC bushings for rattle-free operation; equalising grid (EG) and single-sided foam gasket; neck adaptors for duct connection. Concentric-cone design also gives 360-degree horizontal airflow ideal for VAV applications, optional damper in RAL 9005 black or mill finish. Standards & Certifications: ASHRAE, SMACNA Typical Applications: supply and return ceiling outlets, offices, retail and hotels, VAV systems, 4-way / 3-way / 2-way / 1-way pattern zones Key Differentiators: 4 pattern families in 5 standard sizes; opposed-blade damper and equalising grid accessories; overlapping-blade OBD for tight closure; spring-clip mounting; RAL 9010 / 9016 finishes