The Rinnai RE199eN Outdoor Tankless Water Heater is a high-powered 199,000 BTU natural gas unit designed for outdoor use. With a flow rate ranging from 0.13 to 9.8 GPM, this instantaneous heating system provides hot water quickly and efficiently. The corrosion-resistant heater, produced by the trusted brand Rinnai in Japan, features a compact design with a height of 24.64 inches and a width of 14.05 inches. Its medium water heater profile and low sound level make it a reliable choice for households looking for efficient and environmentally-friendly hot water solutions.