Navien NCB-H Combi Boilers - Optimized for the Ultimate Combi DHW Performance Key features of the Navien NCB-H Combi Gas Boilers: Endless domestic hot water, only when you want it Available in sizes for any home Smart Home compatible - stay connected with the optional NaviLink WiFi Remote Control System Proven quality that is stood by - all units come with warranty Integrated controls supporting single zone, 2-zone, or 3-zone heating, as well as supporting controls for DHW recirculation. Lower your energy bills and exhaust emissions No waiting for hot water with the optional Navicirc recirculation valve Compact, stylish, wall-hung designs - save up to 80% more space compared to a traditional tank water heater Energy Star rated, performing at up to 0.95 UEF efficiency Convertible from natural gas (NG) to liquid propane (LP) Turn-down ratios (TDR) up to 15:1 for DHW and 11:1 for heating - create only as much hot water or heat as is needed Dual stainless steel heat exchangers for heating that better resist corrosion, resulting in a longer-lasting and durable build Safety warning: this is a gas appliance, and as such, requires certified, professional installation. Failure to properly install & commission a gas appliance can lead to serious damage, injury, or death. More information regarding Navien NCB-H combi domestic hot water and heating boilers can be found below: Navien NCB-H Website Navien NCB-H Brochure Navien Combi-boiler NCB-H Product Dimensions & Sizing Information: Model Heating Input (BTU/hr) DHW Input (BTU/hr) Domestic Hot Water Flow Rates  (37°C rise) Dimensions (H x W x D) NCB-160/060H 11,000 - 60,000 BTU/hr 10,700 - 160,000 BTU/hr 4.3 GPM (16 L/min) 29.3" x 17.3" x 12.8" (74.4 cm x 43.9 cm x 32.5 cm) NCB-190/080H 11,000 - 80,000 BTU/hr 10,700 - 160,000 BTU/hr 4.3 GPM (16 L/min) 29.3" x 17.3" x 12.8" (74.4 cm x 43.9 cm x 32.5 cm) NCB-240/110H 13,000 - 110,000 BTU/hr 13,300 - 199,900 BTU/hr 5.4 GPM (20 L/min) 29.3" x 17.3" x 12.8" (74.4 cm x 43.9 cm x 32.5 cm) NCB-240/130H 13,000 - 130,000 BTU/hr 13,300 - 199,900 BTU/hr 5.4 GPM (20 L/min) 29.3" x 17.3" x 12.8" (74.4 cm x 43.9 cm x 32.5 cm) NCB-250/150H 14,000 - 150,000 BTU/hr 14,000 - 210,000 BTU/hr 5.6 GPM (21 L/min) 29.3" x 17.3" x 12.8" (74.4 cm x 43.9 cm x 32.5 cm) Replacing an Existing Navien Boiler? The perfect (and planned for) replacement for the following Navien models: Discontinued NCB-E Model  New NCB-H Model NCB-150E NCB-190/060H NCB-180E NCB190/080H NCB-210E NCB-240/110H NCB-240E NCB-240/130H