Non-pressurized Solar heater:Features: 1) Can be operated completely automatic if connect with intelligent controller.2) Vacuum tube: 1,800mm / Φ58, 15pcs, 20pcs or 30pcs3) Tank: 150L, 200L, 300L4) Collector housing: 0.8mm stainless steel, frame 1.5mm stainless steel, insulation material, rock wool or polyurethane5) Porcelain enamel inner tank, with copper coil inside, anti-freeze fluid do heatconversion to improve freezing-resistant, reduced scale, work normally under-30°C, super-big magnesium rod. 6) Works normally if one tube damaged7)solar systemSolar heater model:

Solar heater model