Navien NCB-H (high output) series condensing combi-boilers are packed with industry-leading upgrades to the popular NCB-E series, including industry-leading BTU output on DHW, 15:1 turndown ratio, a more dynamic BTU lineup with added models, greater DHW performance, a new DHW module with flow control, enhanced controls with multi-line text display, increased 2-inch PVC venting length, easy serviceability with upfront three-way valve and built-in controls for up to three zones.

Navien

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