flat solar water heater

inner si-titanium tank with porcelain coating confroms to standard of foodstaff. Automatic wet painting sintering melts porcelain and metal completely integrated to promise inner tank anti-corrosin, boiling water agravity protection, anti-fatigue. environmental CFC-Free foam polyurethane insulation thickness 50mm, foam density 36kgs/m3, allow super temperature protection to hold heating. water tank life more than 30 years with high class magnesium alloy anode releasing stick, 30% higher grade than DIN4753 standard, to resist corrosion and deposit efficiently in inner tank.