Buderus’ Thermoglaze process protects the interior of the horizontal standing ST Series tank from corrosion caused by most water types. Thermoglaze is a homogeneous, permanent protective coating, bonded to the interior of the metal tank. The large surface area heat exchanger allows for excellent recovery rates; heat exchanger increases with tank volume. The high density fluro-carbon free bonded foam insulation maximizes the protection against heat and temperature loss. The ST Series’ optional recirculation of hot water provides instant hot water at the turn of the tap. It has an easy access cover for cleaning of the coil and tank interior, standard magnesium anode rod for active corrosion protection, and adapts readily to the Buderus Logamatic Control.