Product Details
Product Introduction:
Our company’s door‑hinged return air grille is an end‑of‑line return/exhaust device for central air-conditioning and ventilation systems, installed in suspended ceilings or on walls. Its key feature is a grille panel that opens and closes like a door via hinges, facilitating easy removal and cleaning of the internal filter. It is widely used in indoor return air systems in commercial malls, office buildings, hotels, hospitals, and other types of structures.
General technical specifications (using a mainstream aluminum alloy door‑hinged return air grille as an example):
| Parameter Item |
Specification Details |
| Product Name |
Hinged return air grille (openable louvered return air grille) |
| Nominal size |
Common specifications: 200×200 mm ~ 1000×800 mm (custom non-standard sizes available) |
| Material Configuration |
Standard configuration: aluminum alloy profiles (with electrostatic powder coating); optional: ABS plastic, stainless steel |
| Leaf form |
Single-layer louver blades, with adjustable return air direction. |
| Filter Configuration |
Standard configuration includes a nylon filter screen (washable and reusable); an aluminum filter screen is available as an option. |
| Applicable wind speed |
Recommended return air velocity: 1.5~3 m/s |
| Applicable airflow volume |
Randomly variable dimensions to accommodate the varying return air volume requirements of different systems. |
| Installation method |
Ceiling panel / Wall-mounted recessed installation, flange‑to‑duct connection |
| Activation method |
Hinged panel, opens and closes without tools. |
| Applicable medium |
Indoor return air and exhaust air, medium temperature ≤60℃ |
| Work environment |
-10℃ to +60℃, relative humidity ≤95% (no condensation) |
Applicable Scenarios and Selection Recommendations:
Core use cases:
1. Return air grilles of central air-conditioning systems in shopping malls, office buildings, hotels, and hospitals
2. Terminal return air grilles of the fresh-air system and the purified air-conditioning system
3. Ventilation exhaust outlets for the kitchen, bathroom, and basement
4. Air-conditioning return air / ventilation and air exchange in industrial buildings and workshops
Key considerations for selection:
1. Select based on duct size: Prioritize diffuser sizes that match the duct’s internal diameter to avoid installing reducers, ensuring smooth return airflow and minimizing pressure loss.
2. Select based on the installation environment: In humid, dusty, or highly hygienic environments—such as hospitals and restaurants—door‑hinge‑type operable return air grilles must be used to facilitate regular filter cleaning.
3. Material Selection: In humid or corrosive environments, aluminum alloy or stainless steel is preferred; for cost‑sensitive applications, ABS plastic may be chosen.
4. Filter Selection: For standard applications, a nylon filter is recommended; it is washable and reusable. For environments with high dust levels or stringent air cleanliness requirements, aluminum or high-efficiency filters are available.
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Mobile phone:+86-188-6602-0062
Email:sddljnhb@163.com
Website:http://www.sddljnhb.com
Address: No. 5166, Tianqu East Road, Economic Development Zone, Dezhou City, Shandong Province
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