FEATURE: 1. Special high quality Insulated material to reduce the heat loss 2. Excellent workmanship to guarantee the decent appearance, change for your request 3. Long life span and easy operation 4. This type of solar water heater can work in high pressure 5. It uses the heat pipe which can deliver the heat rapidly 6. The vacuum tube will not break in the winter for there is no water in it, even in the coldest area 7. Each vacuum tube works individually, so the machine will still at work in the event of occational vacuum tube breakag 8. Hot water with pressure make you bathe more comfortable