Relax with Reliable Comfort Season After Season.

With a reliable Lennox® oil-fired water boiler from Quality Refrigeration in Baltimore, you’ll stay warm and snug—even on winter’s most bitter days. And, when you add an optional tankless coil, your high-efficiency boiler can also heat water for all your household needs, for very little money during the winter months.

Read more about the COWB3 boiler.

COWB3 Boiler

Expect years of quiet operation from the COWB3 boiler. It is made with the Beckett® oil burner, which sets the bar for reliable fuel-efficient heating.

  • 85.2% AFUE*
  • Optional, domestic tankless hot water coil delivers hot water for almost no cost throughout the cold season
  • Sealed combustion design keeps noise at a minimum
  • Swing-out burner door for easy cleaning and maintenance
  • Works with traditional radiator systems
  • Cast-iron heat exchanger for lasting reliability
  • 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 Quality Refrigeration are here for you to help with all your boiler needs, whether you’re looking for a new boiler or boiler maintenance. Call our Baltimore location at 410-355-6010 today, or make 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.