- Durable commercial-grade primary copper heat exchanger is 25x better at heat transfer than stainless steel
- Continuous maximum flow rates up to 10.0 GPM
- Indoor model includes integrated temperature controller and advanced diagnostics to simplify troubleshooting
- Factory-installed power cord included for indoor models
- Easy-Link up to 4 tankless water heaters
- Connect up to 20 tankless water heaters with a multi-unit controller
- 6-year limited warranty on heat exchanger in commercial applications / 5-year limited warranty on all parts
The ACT-199I Indoor Natural Gas models are Ultra-Low NOx gas tankless water heaters with condensing technology featuring up to 0.95 Uniform Energy Factor (UEF) which lowers operating costs and is environmentally friendly. ACT-199I uses up to 199,000 BTU/h of gas to deliver 10 GPH. A. O. Smith offers the largest commercial product selection available, including the most specified commercial unit in the U.S. We offer more than 500 different commercial models, including gas fired, oil-fired and electric configurations, ranging in capacities from 5 to 10,000 gallons, with input range from 50,000 BTU to the equivalent of 4,000,000 BTU. Our comprehensive line is the natural fit for spec jobs requiring everything from the smallest commercial installation up to the largest multi-structure complex.