HOLTOP is the leading company in China specializing heat and energy recovery ventilation systems. We are one of equipment suppliers for Beijing Olympic 2008, contracted exchangers supplier many AC brands, such as McQuay, York, Carrier, Trane etc. Our products include ventilators (HRV ERV), ...
Telephone:86-20-39388201
Address:No158 Hanjiachuan Road,Haidian District, Beijing, China, China