Relax with Reliable Comfort Season After Season.

With a dependable Lennox® oil-fired water boiler from Red Dog Cooling, Heating, & Plumbing in Selbyville, you’ll stay cozy and warm—even on winter’s harshest days. Plus, 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 ultraquiet performance from the COWB3 boiler. It features the Beckett® oil burner, which is the standard for reliable fuel-efficient heating.

  • 85.2% AFUE*
  • Optional, domestic tankless hot water coil heats hot water for a very small cost throughout the cold season
  • Sealed combustion design keeps noise at a minimum
  • Swing-out burner door for simple cleaning and maintenance
  • Works with traditional radiator systems
  • Cast-iron heat exchanger for lasting performance
  • 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 experts at Red Dog Cooling, Heating, & Plumbing are always ready to assist with all your boiler needs, whether you want a new boiler or boiler maintenance. Call our Selbyville location at 302-436-2922 today, or set up 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.