
Non/Low Pressure Solar Water Heater. High-Efficient Heat Collection: New generation vacuum tubes with molecular nanotechnology enhance heat absorption by 20 percent. Advanced Film-Coating Technology: International advanced film-coating ensures high solar thermal conversion rates even in cloudy weather. Superior Hail Resistance: High-borosilicate glass 3.3 provides strength against hail up to 25mm diameter. Premium Insulation Material: 55mm polyurethane offers excellent insulation with small, uniform aging cells. Durable Stainless Steel Construction: Outer and inner tanks made of SUS304-2B or 316 food-grade stainless steel. Long-Lasting Sealing Ring: Excellent silica gel material provides a lifespan twice as long as common silica gel. Automatic Digital Control: Digital controller manages water temperature, level, loading, and heating automatically. Versatile Installation Angle: Frame supports installation on slopes and flat places with angles ranging from 20 to 80 degrees.