Solaren cylinder, with smooth inner surface of the lime and the formation of bacterial resistance. Boiler bottom coil Solaren solar energy system, depends on the upper coil hot water tank. Solar radiation at the top of the boiler when the water is heated by serpentine. Solaren boiler over magnesium anode cathodic protection. The surface of the inner surface of the cylinder and coil Solaren enamel coated titanium-doped double-layer, dual protection provided against corrosion in boilers. CFC-free polyurethane insulation is made with Solaren boiler. Heat loss is minimized. Boiler outer plate coated with electrostatic powder coating technique.