Tankless Booster Heater,electric,wall mount,42.0 kW,(6) incoloy-sheathed heating elements,solid state switches,electronic digital display controller,brass pressure reducing valve with bypass,(2) temperature & pressure gauges,(2) dielectric unions,stainless steel exterior,600v/60/3-ph,40.0 amps,UL,cUL,UL EPH (ANSI NSF 5)