Product Details
The Rinnai® Demand Duo™ H-Series is a high-performance, high-efficiency indoor water heater with a Uniform Energy Factor (UEF) of 0.97, offering a heating range from 15,000 BTU (4.3 kW) minimum to 199,000 BTU (58.3 kW) maximum. This hybrid technology system provides up to twice the lifespan of most tanks and ensures a continuous supply of hot water, making it suitable for peak commercial hours. The compact design fits various spaces and features a digital display, energy usage tracking, freeze protection, glass-lined tank, overheat protection, temperature pressure relief valve, WiFi connectivity, and UltraLonox technology. Professional installation is recommended, and the product includes warranty coverage as specified by Rinnai.








