Typhoon-Resistant Windproof Vent Cover

Featuring a dual-duct flow-diversion design, it is developed to address strong wind backdraft, rain intrusion, and odor backflow while maintaining stable exhaust efficiency even under extreme weather conditions.

Dual-Duct Flow Design Level 16 Wind Speed Test Certified 304 Stainless Steel Construction Customizable to Match Exterior Wall Finishes

Why Use a Windproof Vent Cover?

In strong wind conditions, traditional vent covers are prone to backdraft, allowing cooking fumes, rainwater, moisture, and odors to flow back indoors and compromise both indoor air quality and overall comfort.

Cooking Fume Backflow

Poor kitchen exhaust can cause cooking fumes to flow back indoors, leaving greasy residue on walls and worsening indoor air quality.

Rainwater Backflow

When strong winds strike, rainwater and moisture can be driven back indoors, increasing bathroom humidity and the risk of moisture-related wall damage.

Odor Buildup

When the exhaust system is not working properly, odors and moisture cannot be effectively vented, compromising overall living comfort.

Airflow Backflow

Strong external winds can flow directly into the duct, disrupting indoor pressure balance and reducing exhaust efficiency.

Core Technologies and Design Highlights

The design combines dual-duct flow separation, a three-layer structure, and circular airflow guidance to reduce wind backdraft while maintaining smooth indoor exhaust performance.

Dual-Duct Flow Design

By separating indoor exhaust from external airflow, it maintains stable exhaust performance even under extreme weather conditions.

Three-Layer Structure and Multi-Layer Protection

Featuring an outer circular cover with annular openings, the inner duct structure helps block external airflow and reduce backdraft pressure.

Circular Airflow Guidance

Exhaust air first hits the bowl-shaped deflector at the base, then flows evenly through the annular channel to improve exhaust stability.

Performance Test Results

Level 16 strong-wind exhaust test results show that the system can maintain normal exhaust performance under both frontal and side-wind conditions.

Level 16 Strong-Wind Exhaust Test

Testing Institution: Wind Tunnel Laboratory, Department of Civil Engineering, National Central University

Test Report No.: CE-WT-2021-001

Test Date: 2021-01-21

Tested Product: HG-H06

Test Conditions: Wind speed at 51.5 m/s (Level 16 wind), with direct frontal and side-wind exposure, for a duration of 1 minute.

Test Conclusion: Smoke generated by a smoke pellet was successfully discharged within 1 minute, demonstrating that the exhaust performance remained unaffected by direct frontal or side-wind exposure at Level 16 wind speed.

Beaufort Scale	External Wind Speed (m/s)	Average Inlet Wind Speed (m/s)
10	24.5 ~ 28.4	8.75
11	28.5 ~ 32.6	9.47
12	32.7 ~ 36.9	11.00
13	37.0 ~ 41.4	12.71
15	46.2 ~ 50.9	13.87
16	51.0 ~ 56.0	14.53

Product Specifications & Dimensions

The product line is divided into bathroom and kitchen windproof vent cover series based on application.

Bathroom Windproof Vent Cover Series

Model	Compatible Duct Diameter
HG-F03	3" / 7.5 cm
HG-F04	4" / 10 cm

HG-F03 and HG-F04 are models within the same series, each corresponding to a different duct diameter.

Kitchen Windproof Vent Cover Series

Model	Compatible Duct Diameter
HG-H05	5" / 12.5 cm
HG-H06	6" / 15 cm

HG-H05 and HG-H06 are models within the same series, each corresponding to a different duct diameter.

Need help confirming specifications or custom color options?

The right model can be selected based on the application, duct diameter requirements, and exterior wall conditions, with color coating available to match exterior wall tiles.

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