Lennox High Efficiency Boilers


COWB3 Boiler

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Built with the finest quality components, including a Beckett® oil burner and a durable cast iron heat exchanger, the COWB3 boiler delivers quiet, efficient performance year after year.

  • Energy Efficiency
  • Beckett® oil burner—sets the standard for reliable, fuel-efficient heating
    Domestic hot water coil—optional tankless coil provides hot water for virtually no cost throughout the colder months
  • Home Comfort
  • Sealed-combustion design—provides quiet, healthy and draft-free heating
    Easy integration—works with traditional radiator systems to provide precise heating comfort, regardless of outdoor temperatures
  • Reliable Performance
  • Cast iron heat exchanger—designed for long-lasting durability