This vacuum tube solar water heater is a typical household solar water heater. This kind solar water heater has the limitatin since the pipe needs to fullfill with water, it isn't anti-freeze. Performance Data Vacuum Tubes 1. Whole glass vacuum tubes adopt super hard borax and silica glass; 2. Absorb rate: 93%, thermal radiation rate: 6 %( 100) 3. Temperature when exposed to sun without water: 250C, 2.5hours to boiling if using single tube; 4. Resist 25mm hail, using life can last 15 years.
This solar water heater is an economical choice.
This vacuum tube solar water heater is a typical household solar water heater. This kind solar water heater has the limitatin since the pipe needs to fullfill with water, it isn't anti-freeze. Performance Data Vacuum Tubes 1. Whole glass vacuum tubes adopt super hard borax and silica glass; 2. Absorb rate: 93%, thermal radiation rate: 6 %( 100) 3. Temperature when exposed to sun without water: 250C, 2.5hours to boiling if using single tube; 4. Resist 25mm hail, using life can last 15 years.
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