H2O+ 12‑Gallon Hot & Cold Water Dispenser vs Noritz NRCB Combi Boiler

The H2O+ 12‑Gallon Hot & Cold Water Dispenser provides chilled, room‑temperature, and boiling water at the touch of a button. Its stainless‑steel reservoir holds up to 12 gallons, reducing the need for frequent refills and ensuring a constant supply for drinks, cooking, and sanitation. Designed for both residential kitchens and small‑office break rooms, the unit features a sleek, space‑saving footprint and a user‑friendly interface. Energy‑saving mode and child‑safety lock make it a practical, safe addition to any environment.

The NRCB series is Noritz's combination boiler, which handles both space heating and domestic hot water from a single wall-mounted appliance. That combination is the point: instead of a boiler for the radiators and a separate tank water heater, one unit does both, freeing the floor space a tank would occupy and removing the standby heat loss that comes with keeping a tank hot around the clock. Because it is tankless on the hot water side, supply is continuous rather than limited by tank capacity, so back-to-back showers do not run out. Noritz is a tankless water heating specialist with residential and commercial ranges, and supports the NRCB with a sizing guide, plumbing diagrams, BIM and Revit files, installer training, a PROCard programme and installer and servicer locators.

• Fast boiling and chilling cycles
• Large 12‑gallon reservoir reduces refills
• Energy‑saving standby mode
• Stainless‑steel construction is durable

• Replaces two appliances with one wall-mounted unit
• Continuous hot water with no tank to run out
• Frees the floor space a tank would take
• Strong installer documentation and training infrastructure

• No built‑in water filtration beyond basic carbon filter
• Unit is relatively heavy to move
• No Wi‑Fi or app integration

• Requires professional installation and correct sizing
• Pricing runs through installers rather than being published
• Combi units can struggle with simultaneous heavy hot water draws