High-performance metal duct fan with full heat exchange and fresh air system integration, engineered for superior ventilation and noise reduction. Precision-crafted from galvanized steel with anti-corrosion coating for durability in high-humidity environments. Advanced soundproofing foam lining reduces operational noise to 25dB for residential/commercial use. Multi-directional flange design ensures airtight connections with spiral ducts (80-400mm diameter). Integrated mounting brackets allow ceiling/wall installation in basements, kitchens, or industrial spaces. Thermal insulation layer prevents condensation in extreme temperature applications (-30°C to +120°C). Maintenance-free DC motor with 50,000-hour lifespan and energy-efficient operation. Compatible with smart home ventilation systems via optional IoT module. CE-certified for EU safety standards with 3-year warranty coverage.