Antifreeze Vacuum Tube Heat Pipe Solar Collector with Solar Keymark

A single ETC-20 tube collector is ideal for residential households of 2-3 people, able to provide 60-80% of domestic hot water demand (depending on location). For commercial projects that demand a lot more hot water such as such as hotels, dormitories and car washes, multiple ETC-20 collectors can be connected to form a larger solar thermal array.