Tankless water heaters provide their share of benefits. They are typically more energy efficient than tank units while providing a continuous supply of hot water, which is ideal for filling a big hot tub or a whirlpool. They’re also more compact than a standard water heater and mount on a wall. However, the primary disadvantage of on-demand or instant hot-water heaters is that they don’t produce enough hot water to serve most households or commercial applications. Rinnai America’s Demand Duo 2, though, capitalizes on the benefits of a tankless system while eliminating the disadvantages.
The commercial hybrid water heating system is
