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The Combination Boiler That Exceeds All Your Hot Water and Hydronic Space Heating Needs

June 19, 2017


Consumers get two solutions in one with this on-demand boiler serving up domestic hot water and space heating from one unit. The Noritz Combination Boiler is a year-round, whole-home solution that delivers hot water to both plumbing and hydronic heating applications.


This means having one unit doing the work of two — and more resourcefully at that. The unit performs at a 95 percent AFUE (Annual Fuel Utilization Efficiency); that is, 95 percent of the fuel consumed goes to heating the water to the preset temperature, as opposed to being lost through the flue. This fuel-saving performance meets “Energy Star Most Efficient” standards, meaning that, with the Combination Boiler, you will be able to qualify for various state energy rebates around the country and offset the initial cost.


On the space heating side, the Combination Boiler accommodates a host of applications including radiators, baseboards, low and high mass radiant heating (i.e. in-floor, snow melt, etc.) and air handlers.


  • Built-In outdoor reset control

  • Integrated Grundfos pump

  • Whole home domestic water heating capability

  • Motorized self regulating flow control


Two models are available for different levels of demand:


  • The CB180DV has a maximum input Btuh of 180,000 for hot water and 100,000 Btuh for space heating