... cold area, even -35oC. Now, the split solar water heater is more and more popular in the world.Advantages of ... combined with existing energy source, such as your gas water heater, electric water heater, boiler, etc;4) There is an auxiliary heating ... water heater you could generate enough solar energy to heat 70% of your hot water, FREE, year after year! Split Pressurized Solar Water Heater Heat Pipe ...