Return Air Grilles
return air grille with filter
| Brand | shengtongJH |
|---|---|
| Opening options | 400 × 500 / 500 × 500 / 500 × 750 mm, W × H |
| Face material | Coated steel or aluminium |
| Access face | Removable or hinged |
| Filter holder | Track or seat matched to actual panel dimensions |
| Nominal filter depth | 25.4 / 50.8 mm options by assembly |
| Panel media | Specified pleated or other suitable panel medium |
| Latches | Positive closing arrangement suitable for mounting position |
| Sealing | Grille frame and filter perimeter details selected separately |
| Finish | White, grey or required powder coating |
| System selection | Filter resistance included in the return-path calculation |
Filter media and ratings are selected components; they are not established by the grille dimensions or front-face appearance.
The grille, holder, filter dimensions and access direction can be customized as a coordinated return-air assembly.
A return air grille with filter combines the visible air opening and a matched filter-access arrangement. Selecting the face and holder together helps avoid a grille that fits the wall but cannot accept or release the intended filter panel.
Buy the face and filter rack as one interface
A return face and a filter rack may each be suitable on their own but still fail to work together. The rack can be too deep for the wall, the filter can clash with the hinge, or the access opening can be smaller than the panel that must pass through it. Specify the complete arrangement before selecting the individual parts.
A section drawing is useful because it shows the frame, holder, panel and rear connection in the same space. Include the direction in which the filter is removed and the room available in front of the grille during service.
During operation
The filter should stay seated under return-air suction. The face should close reliably without using its blades to press a wrongly sized filter into place.
During replacement
The maintenance team should be able to open the face, release the panel and remove it without scraping media across sharp edges. Check that latches remain accessible after nearby finishes are complete.
During selection
Use the pressure loss of the actual panel and face at the design flow. If the system already has central filtration, review whether an additional local stage is needed and how it affects the fan.
Define what the supply includes
The purchase order should distinguish a grille supplied with an initial filter from a grille supplied with a holder only. Include replacement-panel details and any required seals or retainers. This removes ambiguity at delivery and gives the facility team a clear route to future replacement without guessing from the nominal grille size.
The grille, holder, filter dimensions and access direction can be customized as a coordinated return-air assembly.