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Self-closing Louvered Air Vent

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Self-closing Louvered Air Vent

  • Phone : +86 15953773633
  • Email : wangxueqiang077@gmail.com
  • Wechat : +86 15953773633
  • Whatsapp : +86 15953773633
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Product Description

Core Features

  • Automatic Opening and Closing: The louvers hang naturally under gravity, remaining normally closed. When the fan starts and positive pressure forms in the duct, the louvers automatically open to supply air. After the fan stops, the louvers automatically close to prevent backflow.
  • Powerless Design: Requires no electric actuator or power supply; opening and closing are achieved entirely by airflow pressure and gravity. The structure is simple and highly reliable.
  • Fireproof Function: Some models can be equipped with fire dampers to meet fire ventilation requirements. In case of fire, the dampers automatically close to prevent smoke spread.

Applicable Scenarios

  • Fire Scenarios: Positive pressure ventilation systems in building stairwells, lobbies, refuge floors, etc., serving as a key component for fire smoke extraction and ventilation.
  • General Scenarios: Basements, warehouses, and other ventilation areas requiring prevention of odor and insect backflow, or unattended ventilation systems.

Core Values

  • Safe and Reliable: The powerless design avoids the risk of electrical failures, resulting in a long service life and extremely low maintenance costs. Energy efficient: Automatically closes when shutting down to prevent cold/hot air leakage and reduce air conditioning energy consumption.
  • Fire protection compatible: Can be linked with fire protection systems to meet building fire safety regulations and ensure personnel safety.

Frequently Asked Questions

Q1: Are you a manufacturer or a trading company?

A: Dezhou Wohui Environmental Protection Technology Co., Ltd. is a manufacturer founded in 2005, specializing in central air conditioning vent terminal equipment including air vents, air valves and louvers. We are located in Dezhou, Shandong, China.

Q2: What products do you mainly produce?

A: Our main products include air vent grilles, ceiling diffusers, volume control dampers, air valves, ventilation louvers, and related HVAC terminal equipment. Products are exported to more than 80 countries.

Q3: Can you customize products according to drawings?

A: Yes. We support OEM/ODM customization with various materials. Please send your drawings to wangxueqiang077@gmail.com and our team will reply within 6 hours.

Q4: What is your MOQ?

A: MOQ depends on product type. Please contact our sales team via WhatsApp +86 15953773633 for exact quotation.

Q5: Do you have quality certifications?

A: Yes, we have ISO and SGS certificates. Our products pass relevant departmental inspections.

Q6: What is the difference between an air grille and a diffuser?

A: An air grille is a fixed or adjustable louvered outlet for supply or return air, while a diffuser is designed to distribute air more evenly across a space. Dezhou Wohui supplies both types for HVAC systems.

Q7: What materials are available for air vents?

A: We offer aluminum, galvanized steel, stainless steel, and ABS plastic air vents, with powder coating and anodizing options.

Product Show

Dezhou Wohui Environmental Protection Technology Co., Ltd., located in Luquantun Development Zone, Wucheng District, Dezhou City, Shandong Province, enjoys a superior geographical location and beautiful environment. Founded 20 years ago, the company’s main products include various central air conditioning vents, movable grille vents, subway plug-in vents, fresh air systems, activated carbon filters, as well as various fans, air valves, silencers, and static pressure boxes. Our products have passed relevant departmental inspections and obtained certifications.

Our products sell well throughout China and are widely used in building ventilation, fire prevention, and explosion-proof projects in numerous industries such as chemical, mining, metallurgy, food manufacturing, papermaking, office buildings, schools, government agencies, hotels, airports, underground parking lots, and residential buildings, gaining recognition from industry clients. Since its inception, the company has always adhered to the principle of “customer first, striving for progress,” focusing on the air conditioning and ventilation industry, driven by technology, and concentrating on the innovative research and development of new ventilation equipment and air conditioning terminal products.

We welcome new and old customers from all over the world to discuss cooperation! Let’s work together for mutual benefit!

Our products not only sell well in more than 20 provinces and cities across China, but are also exported to countries such as the United States, Malaysia, Japan, and South Korea, winning high praise from many users.

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