Return Air Grilles
25x16 return air grille
| Brand | shengtongJH |
|---|---|
| Nominal opening W × H | 25 × 16 in / 635 × 406.4 mm |
| Orientation | Landscape opening, width first |
| Core | Fixed horizontal louvres or chosen open-grid alternative |
| Material | Aluminium or coated steel |
| Frame | Surface-mounted border with specified overlap |
| Access | Fixed or removable core |
| Filter option | Holder selected for actual panel and service path |
| Finish | Off-white, white or selected colour |
| Fixing | Even perimeter support and appropriate fasteners |
| Operating inputs | Airflow, rear box arrangement and allowable resistance |
The nominal opening area is only one selection input. Face free area and the rear connection determine the effective air path.
Frame, core, finish and rear interface can be customized to the wide return opening and available maintenance space.
A 25x16 return air grille uses a wide rectangular opening where height is more constrained than width. The face and rear return box should be planned together to keep that broad opening useful.
Use a wide opening without creating a shallow bottleneck
A broad face can help fit a return into a low wall band, but it needs enough space behind it for the intended flow. If the box is very shallow or the branch enters at a restricted end, parts of the grille may contribute less effectively than expected.
Review the plenum section and branch connection before finalising the face. A sensible transition can be more useful than changing to a different front pattern after the rear restriction has already been built.
Give the border an even seat
A long surface frame can show distortion if the opening is uneven. Provide a stable perimeter, check the corners and use the intended fixing points. Avoid using excessive screw force to pull a flexible frame against a poor substrate.
Keep the centre serviceable
If the core is removable, reserve enough room in front of it for safe handling. A nearby cabinet or pipe can obstruct removal without visibly blocking the grille during operation. That conflict is easier to resolve before the installation is finished.
Match the service scope to the order
For an unfiltered return, a removable centre may provide sufficient cleaning and inspection access. If a filter is required, define its actual dimensions, holder depth and retaining arrangement. The grille opening does not identify those parts by itself.
Provide the return flow and allowable resistance alongside the dimensional schedule. This gives a clear basis for comparing different blade or grid constructions and avoids treating equal outside dimensions as proof of equal air performance.
Frame, core, finish and rear interface can be customized to the wide return opening and available maintenance space.