The Eccotemp FVI12-NG tankless water heater is a natural gas fired, indoor tankless water heater designed for small to medium hot water production where you need more than one hot water application at the same time. The Eccotemp FVI12-LP tankless water heater is perfect for vacation cabins, cottages, and smaller homes. Eccotemp FVI12-NG tankless water heater comes with a horizontal stainless steel vent kit, ready to install. The Eccotemp FVI12-NGs 120 volt UL listed power cord powers the internal exhaust fan and digital display. It only pulls about 2 watts idle and 1.07 Amps during operation, making it ideal when energy conservation is paramount. The FVI12 offers a 45 degrees F temperature rise when operating at maximum flow capacity and a 77 degree F temperature rise at 2.3 GPM.