Whole Home Heater: Heat the whole house with our tankless boilers, featuring a stainless-steel heat exchanger with a modulating wire mesh burner, and experience energy-efficient warmth and comfort Smart Features: This high-efficiency gas boiler's multizone control capability allows thermostat and integrated control pumps to connect directly to the boiler; Wall mount heater features safety child-lock that automatically turns off central heating Easy Interface: Our energy efficient heater has a digital display main screen, temperature and pressure display, and an outdoor reset sensor with easy parameter settings; Adjust CH temperature between 104°F and 180°F and DHW between 98°F and 140°F Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your boiler; We do not recommend installing a heater without a technician Guaranteed to Last: 12-, 5-, and 1-year residential and 5-, 5-, and 1-year commercial standard warranty for heat exchanger, parts, and labor respectively