Noritz’s CB combination boiler use high-efficiency condensing technology to deliver hot water to both plumbing and hydronic heating applications. Delivering up to 9.2 gal. per min. of domestic hot water, it can be used on many applications including radiator, baseboard or in-floor radiant hydronic heating; water-to-air heat exchange with an air handler; and pavement snow melting. The CB180DV has a maximum of 180,000 Btuh for hot water and 100,000 Btuh for space heating. The CB199DV has a maximum of 199,000 Btuh for hot water and 120,000 Btuh for space heating.