The Certikin Genie range of gas condensing pool heaters is one of the worlds most efficient direct fired condensing pool heater.  Each model uses a direct fired stainless steel heat exchanger encased in a plastic composite housing.  97 Percent efficiency.  Jandy heaters are lightweight and high performance insulation materials make a heater that is clearly excellent value for money.  Fan assisted control combustion.  Corrosion resistant polymer headers for improved circulation.