GreenTech AG was founded in 2009 and is a branch of the Swiss Federal Institute of Technology (ETH). Focused on research and development, productionGreenTEG Heat Flux Sensor gSKIN Series、 UU value measuring instrument,Shanghai Anyi is the agent of Swiss company GreenTech in China. The attachment is the data for the U-value tester kit-2615C, please feel free to download it.