The Eccotemp Builder Series 6 GPM Indoor Natural Gas Tankless Water Heater (6GB-ING) is CSA approved and rated at an impressive 6 GPM with a temperature rise of 45 degrees. This tankless water heater is rated at 145,000 BTU and can produce unlimited hot water for 2-3 applications simultaneously. Eccotemp’s advanced 0.53 GPM low-flow ignition technology allows users to enjoy endless hot water without experiencing cold spots. We recommend the 6 GPM Indoor Natural Gas Tankless Water Heater (6GB-ING) for standard to smaller-size single-family homes, townhomes, condos, and cabins, as well as smaller commercial applications and home builders. With our upgraded product control board performance and an all-new gas modulating valve, consumers can experience best-in-class temperature performance that is budget-friendly. The space-saving wall-mounted Eccotemp 6GB-ING has a 110/120-volt UL listed power cord that powers the internal exhaust fan, anti-Freeze protection, and product control board. With its fully automated control system, the Eccotemp 6GB-ING pulls less than 0.34 amps during operation, making it ideal for low energy consumption and efficiency. The Eccotemp 6GB-ING has been CSA tested and approved for US & Canadian use at elevations up to 2000 feet. Installation and use of the Eccotemp 6GB-ING above 2000 feet may affect overall product efficiency and performance. Installation and use of the Eccotemp 6GB-ING above 5000 feet is not recommended. IMPORTANT NOTE: Cannot be used for HYDRONIC SYSTEMS, RECIRCULATING, or FLOOR HEATING.