Relax with Reliable Comfort Season After Season.

With a sturdy Lennox® oil-fired water boiler from Assured Appliance and Heating & Air in Genoa, you’ll stay cozy and warm—even on winter’s most bone-chilling days. Also, with the addition of an optional tankless coil, your high-efficiency boiler can also heat water for all your household needs, for only a small cost during the winter months.

Read more about the COWB3 boiler.

COWB3 Boiler

You will enjoy years of near-silent heating from the COWB3 boiler. It includes the Beckett® oil burner, which sets the bar for predictable fuel-efficient heating.

  • 85.2% AFUE*
  • Optional, domestic tankless hot water coil heats hot water for very little cost throughout the cold season
  • Sealed combustion design keeps noise at a minimum
  • Swing-out burner door for simple cleaning and maintenance
  • Functions with traditional radiator systems
  • Cast-iron heat exchanger for lasting durability
  • 20-year limited warranty on heat exchanger, 1-year limited warranty on remaining covered parts
COWB3 Boiler
Efficiency Rating (AFUE): up to 85.2

Our boiler professionals at Assured Appliance and Heating & Air are always ready to assist with all your boiler needs, whether you want a new boiler or boiler maintenance. Call our Genoa location at 847-293-0047 today, or schedule your appointment online.


*Annual Fuel Utilization Efficiency (AFUE) measures how efficient the appliance is in converting its fuel’s energy into heat over the course of a year.