With stainless steel heat exchangers and multiple venting options, the ENERGY STAR-compliant Infiniti GS and GR tankless water heaters combine reliability with flexibility to meet the demands of both residential and commercial applications and accommodate a variety of installations. Both models boast a wide array of features to increase efficiency and make service and maintenance more convenient, with the GR adding an integrated recirculation pump with dedicated connection and the GS featuring a high temperature setting of 180°.