Bosch Thermotechnik Instant Hot Water Dispenser vs Noritz NRCB Combi Boiler

The Bosch Thermotechnik Instant Hot Water Dispenser delivers boiling water within seconds, eliminating the need for kettles and reducing wait times for tea, coffee, and cooking. Its compact design fits under counters or on countertops, making it ideal for both residential and light‑commercial settings. Equipped with Bosch's reliable heating technology, the unit maintains a constant temperature while using energy efficiently. Safety features such as child‑lock and automatic shut‑off ensure peace of mind, while the sleek stainless‑steel finish adds a modern touch to any space.

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.

• Near‑instant boiling water
• Energy‑saving heating element
• Safety lock and auto shut‑off
• Sleek, durable stainless‑steel build

• 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 smart/app connectivity
• Limited to hot water only
• Requires professional installation

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