Japanese Technology,
Made in China Excellence
SAYI, founded in Shanghai and operated by Shanghai Zowei Industrial Co., Ltd., is a professional fresh air system R&D and manufacturing enterprise. We adopt advanced Japanese ventilation technology and quality management standards, producing high-quality HVAC equipment in our modern Chinese manufacturing facility.
With 15 years of industry experience and a strict quality control system, SAYI specializes in HRV/ERV systems, fresh air dehumidifiers, ceiling dehumidifiers, bathroom heaters, and air purification equipment.
Our products are certified with ISO 9001, CE, 3C and other international standards, and exported to multiple countries and regions worldwide, covering Southeast Asia, Middle East, Russia, Europe, South America, Africa and other core markets. We are committed to delivering energy-efficient, reliable, and innovative HVAC solutions for residential, commercial, and industrial projects globally.
15+
Years Industry Experience
15+
Years Manufacturing
50000+
Units Delivered
ISO/CE/3C
International Certifications
