Rinnai’s Demand Duo™ Commercial Hybrid Water Heating System is the smart choice when it’s time to replace a standard tank. Featuring a part-tank, part-tankless design, the Demand Duo offers the best of both technologies in a quick and easy upgrade that delivers an endless supply of hot water.
The Rinnai Demand Duo pairs a durable, energy-efficient 119-gallon storage tank with a Rinnai C199 tankless unit, creating a direct replacement solution with connections similar to most high-efficiency tanks that provides continuous hot water. This means the Demand Duo is simple to install and keeps pace with an establishment’s hot water needs – from brief, high-spike draws to a supply that is ready to go the distance, day in and day out.
Because the Demand Duo’s heat source is placed outside the tank, it actually offers more water heating capacity than traditional units. Furthermore, the removal of the heating element from inside the tank eliminates thermal stress on the tank itself, lengthening the life of the unit and its ability to consistently output hot water. In fact, Rinnai’s warranty on the Demand Duo is twice that of traditional commercial tanks (6-year heat exchanger and tank, 5-year parts, 2-year labor), and it is backed with a No Risk Satisfaction Guarantee.*
Don’t Just Swap Out, Swap Up
Rinnai’s Demand Duo™ commercial hybrid heating system is the smart choice when it’s time to replace a standard tank. Our unique “best of both” system lets your business quickly and easily upgrade to a unit that offers an on-demand and continuous supply of hot water.