A.O. Smith Signature Series 10-GPM 199000-BTU Indoor Natural Gas Tankless Water Heater

A. O. Smith's Signature Series indoor natural gas water heater uses up to 199,000 BTU/h of natural gas to deliver a 10-gallon-per-minute flow rate (based on a 35°F rise) of continuous hot water when sized appropriately. Therefore, it's a good match for whole-home applications. This tankless unit provides hot water on demand, which is one of the most energy-efficient ways to heat water. Operating at a 0.93 Uniform Energy Factor (UEF), this condensing indoor model helps reduce your energy consumption and utility bills. Additionally, its design enables easy indoor wall mounting, saving valuable storage space. This model may qualify for additional energy-efficiency rebates and tax credits in your local area. Indoor natural gas tankless water heaters require professional installation. 

•     Delivers continuous hot water for up to 3 simultaneous showers and 1 sink when sized appropriately (based on a 0.5 GPM faucet and a 2.5 GPM showerhead in the southern zone)
•     Operates at a 0.93 Uniform Energy Factor (UEF) for maximum energy efficiency and cost savings on this Ultra Low NOx indoor model
•     Frees up valuable storage space with compact, indoor wall-mounted design
•     Professional installation required
•     Uses a 3/4 inch gas line
•     Features integrated controls for easy temperature control and troubleshooting
•     Copper primary heat exchanger and stainless steel secondary heat exchanger provide superior heat transfer and protection for improved durability
•     Worry-free safety features include freeze, overheat and surge protection as well as troubleshooting diagnostic codes