Utica 15B-K Series Gas-Fired Hot Water Boiler – 120,000 BTU – Natural Gas
The Utica 15B-K series gas-fired hydronic boiler is a reliable, contractor-trusted solution for residential and light commercial hot water heating systems. Designed for chimney-vented installations, this unit delivers 120,000 BTU input with an 84% AFUE efficiency, providing dependable performance at a competitive cost.
Built with a heavy-duty cast iron heat exchanger, the 15B-K boiler offers long service life and consistent heat output. The boiler ships factory-assembled and complete, including Honeywell controls, motorized vent damper, relief valve, drain valve, circulator, and safety devices.
Supplied for natural gas operation, with optional LP conversion kits available separately, this boiler is ideal for replacement jobs, upgrades, and new hydronic installations.
Trusted Utica Boilers quality
120,000 BTU input / 88,000 BTU AHRI net output
84% AFUE efficiency
Cast iron heat exchanger for durability
Integrated safety controls and vent damper
Ideal for baseboard & radiant heating systems
IMPORTANT: Installation must be performed by a licensed professional. Verify venting, gas type, and local code requirements prior to purchase.