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Product Spotlight



In today’s commercial boiler market, efficiency, durability and the environment are everything. The KN-Series has stood the test of time and has outperformed the competition in all facets.


A staple in the condensing boiler market for over 15 years and over 26,000 installations the KN-Series uses the durability and heat retention capabilities of cast-iron heat exchangers with state-of-the-art air/fuel delivery systems and the HeatNet control platform to outpace the competition keeping KN at the head of the class.


Rugged and long lasting, cast-iron is the ideal material for condensing boiler systems. KN-Series boilers are built to last the long haul and backed by the industry's best heat exchanger warranty. All heat exchangers carry a 25-Year non-prorated warranty* covering materials and workmanship against failure due to condensate corrosion and thermal shock.


*See KN-Series written Warranty for specific requirements.

Features & Benefits


  • Up to 99% efficient
  • Cast-Iron/Hydrophobic Stainless Steel Heat Exchangers
  • Variable volume
  • 25-Year Heat Exchanger Warranty
  • Tru-flow air/fuel delivery system
  • Full modulation
  • 20 - 100° Delta T's
  • Vent up to 100'
  • Fits through standard doorway
  • NG/LP/Dual fuel
  • HeatNet Control Platform
  • 7" LCD touchscreen display
  • HeatNet Online monitoring (optional)


Available Downloads


Product Spotlight