Your Global Partner in Large-Space Climate Solutions

Kool Air International Development Ltd, operating under the RTFANS brand, is a premier manufacturer and integrated solutions provider specializing in high-performance ventilation and cooling systems for large spaces. With over 24 years of proven expertise, we combine evaporative cooling technology with HVLS (High‑Volume, Low‑Speed) fan systems to deliver energy‑efficient, reliable, and sustainable climate control solutions. As one of the earliest suppliers of both evaporative air coolers (since 2003) and HVLS ceiling fans (since 2010) in China, we are a company of “knowing how” – a hallmark of our deep engineering insight and practical experience in large‑space air handling.

Our comprehensive product portfolio includes advanced evaporative air coolers, durable evaporative cooling pads (wet curtains), heavy‑duty HVLS ceiling fans, and industrial‑grade exhaust fan systems. These products are meticulously engineered to serve demanding applications in factories, warehouses, distribution centers, stadiums, agricultural barns, and other expansive facilities, ensuring optimal air circulation, precise temperature reduction, and effective humidity management.

We pioneered the innovative “fan + cooler combo” system, which synergizes evaporative coolers with HVLS fans to provide uniform, duct‑free cooling, achieving up to 80% energy savings compared to conventional air conditioning. Backed by a 15,500‑square‑meter manufacturing facility with rigorous quality assurance, we deliver robust products that meet international standards. Our solutions are exported to over 80 countries, including the United States, Canada, Australia, Europe, Japan, South Korea, and across Southeast Asia, while our domestic network of 100+ distributors ensures localized support. As an industry leader, we are committed to advancing low‑carbon, cost‑effective air handling solutions for diverse industrial, commercial, and agricultural sectors worldwide.