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Email: sddljnhb@163.com
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The louver‑type ventilation fan (wall‑mounted louver exhaust fan) is a square, axial‑flow ventilation device featuring an ABS flame‑retardant plastic housing and an automatic opening‑and‑closing louver mechanism. When powered on, the louvers automatically open to exhaust air; when power is off, they close under gravity, effectively preventing outdoor insects, rain, and cold drafts from entering. By rotating its axial‑flow impeller, the fan creates negative pressure, swiftly removing moisture, odors, cooking fumes, and stale air. It offers quiet operation, energy efficiency, dust and rain protection, easy installation, and automatic wind‑blocking functionality. Available in a 220V single‑phase household version and a high‑power industrial model, it is widely used for ventilation in kitchens, bathrooms, small shops, warehouses, and other spaces.