This compact pressure solar heater is a new design. The tank with silicon for vacuum tubes. And there has a copper coil in the tank for thermostat.
Feature:
1. Vacuum tubes: Heat pipe in the tube
2. Inner tank material: SUS304-2B with 1.2MM
3. Outer tank material: Imported color steel with 0.41MM or stainless steel
4. Insulation material: 50mm
5. Frame material: Imported galvanized steel plate or Imported stainless steel plate