Heat exchanger for continuous-flow heater - has heater coils in metal pipes insulated on inside

摘要

The heat-exchanger is for a continuous flow water heater, having pipes forming a coil and containing plain coils of heating wire. The pipes (1) are of metal with a coating (2) of insulating material on their inside surface. The straight portions of the pipes can be fixed to solid holders (4) forming the bends (7) in the coil. ADVANTAGE - Combines electrical insulation of pipes from heater coils with protection of pipes from corrosion.