Air vents are the interface between the duct system and the usable space. When selecting air vents in Hai Phong, it is necessary to consider their supply or return function, installation location, design airflow, and ceiling/wall architecture; one should not choose based solely on appearance.
Distinguishing between supply and return doors
The supply vent distributes treated air into the room, while the return vent returns air to the equipment or return line. The drawing must clearly indicate the symbol, size of the connector, direction of airflow, and location to limit direct drafts into the work area. If the area requires specific hygiene or operation, the configuration must conform to the project's design documents.

Information that needs to be finalized before placing a manufacturing order.
- Door face dimensions and joint dimensions.
- Design flow rate, slat type, and adjustment direction, if any.
- Materials, finish colors, and fixing options.
- Ceiling/wall thickness, clearance behind, and ease of removal for cleaning.
At the construction site in Hai Phong, comparing the shop drawings with the existing ceiling and ductwork before production helped minimize on-site modifications. Sao Viet Ducting accepted the request to supply air grilles, accessories, and ducts according to specifications confirmed by both parties.
Frequently Asked Questions
Is it possible to change the door size after the pipe has been manufactured?
The dimensions of the connector neck and the opening should be checked for synchronization before machining to avoid any transition issues.
What do I need to send to receive advice?
Please submit drawings, flow rate, installation location, and surface finish requirements.
Contact Sao Viet Air Ducting
Address: 267 Le Thanh Tong Street, May Chai Ward, Hai Phong City. Hotline: 0815 999 826 · 0934 559 168 · Technical Support: 0949 852 886 · 0822 555 659.
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