"Enjoy hot water on demand, anytime! The Onsen 14L Indoor Gas Tankless Water Heater turns cold water into instant hot water when you want it. Fueled by propane, the 14L has an electronic ignition powered by a standard 120v outlet and activated by water pressure & flow. It also features a direct vent system that pulls air from the outside to burn gas, preventing the loss of warm indoor air and allowing for installation in restricted spaces such as a closet. The 14L is designed with a control system that monitors the water temperature and adjusts the burner to deliver a stable supply of hot water, while the LED display and control panel allow you to view current settings and select outgoing temperatures. Requiring less than 1 amp, the 14L is ideally suited for remote locations equipped with an off-grid solar system. Compact and energy-efficient, the Onsen 14L is your hot water solution for a 1-bath apartment, tiny home, cabin, or cottage.EXHAUST & INTAKE PIPING NOT INCLUDED.NOT SUITABLE FOR HYDRONIC, CLOSED LOOP, RECIRCULATING OR FLOOR HEATING SYSTEMS."