The PYHF900/400 Hinged Filter Grille is an industry-standard domestic return air grille, suitable for ceiling or wall mounting. Its hinged core allows easy access to the filter for cleaning and maintenance, while the slide-in filter prevents dust from entering the return air duct. Constructed from lightweight aluminium with a 12 mm cubed lattice core, it combines strength, functionality, and a clean, modern finish.
Application
Ideal for domestic HVAC return air installations that require integrated filtration and easy maintenance. Commonly ceiling mounted but also suitable for wall applications. The removable filter helps maintain air quality by preventing dust accumulation, with cleaning or replacement recommended every six months in domestic settings.
Features / Benefits
- Lightweight aluminium construction for durability and easy handling
- 12 mm cubed eggcrate lattice core in extruded aluminium frame
- Hinged core secured with thumbscrews for quick filter access
- Slide-in panel filter prevents dust entering the return air duct
- Filter supplied as standard and removable for cleaning
- Core fully removable for straightforward installation and maintenance
- Standard powder coat satin white finish
| Nominal Neck Size | Neck Area sqm | Air Flow (L/s) for Core Velocity |
| 1.5 m/s | 1.75 m/s | 2 m/s | 2.5 m/s |
| 900 x 400 | 0.36 | 411 | 479 | 548 | 685 |
| Test Figures |
| Media Type | TM50 | TM30 |
| Face Velocity | 1.75 m/s | 1.78 m/s |
| Arrestance #4 Dust | 72.8% | 60.5% |
| Initial Resistance | 20 Pa | 13 Pa |
| Dust Holding Capacity | 16.7kg/m @ 62 Pa | 1.4kg/m @ 39 Pa |
Note:
Select grille size to suit face velocity
Filter performance at a velocity greater than 1.8 m/s is not guaranteed
