1. more collectors in the alpine environment 2. avoid the vacuum caused by the film goes a long exposure

CFC-free tubes of the three targets using the international advanced coating technology, a unique 12-layer metal film, thermal efficiency 14% higher than the traditional tube, reflectance 30% -40% lower. Durable than the traditional vacuum insulation increased by 30%, higher water temperature, hot water more collectors in the alpine environment is more effective. At the same time avoid the vacuum caused by the film goes a long exposure, color, performance degradation and other issues, longer life. 

CFC-free tubes