The 5.28 GPM Camplux residential tank less water heater supply on-demand comfortable constant hot water for residential whole home use. lt is powered by 120 VAC voltage, has an imported PCB, precise temperature control, double adjustment of water and air, and rising of the third gear making it perfect for constance hot shower at homel The ideal operating range for the 5.28 GPM Camplux residential tank less water heater is 70-150 PSI. CSA certified Camplux tank less water heater focus on phosphorus oxidized copper heat exchanger with high temperature and corrosion resistance technology and advanced multiple protection systems to ensure your safety.