The CB series of combination boilers from Noritz is a year-round whole-home solution that utilizes high-efficiency condensing technology to deliver hot water to both plumbing and hydronic heating applications, including those in colder climates. The CB combi performs at a 95% AFUE, meaning 95% of the Btu/hr. input is converted into usable heat. The fuel-saving performance meets Energy Star Most Efficient standards.
Noritz combi boilers
![Noritz combi boilers](http://www.supplyht.com/ext/resources/SHT/2016/Feb-2016/sht0216_Products_Noritz.jpg?1456253388)