Reliability and Comfort Every Cold Season Can Be Yours with an Oil-Fired Water Boiler.

Thornberry Bros Inc in Winchester knows the winters seem to go on forever, but we can help you stay snug and warm. Our sturdy Lennox® oil-fired water boiler is just what you need. This boiler will keep your home warm and can be equipped with an attached tankless coil to heat water for your showers, laundry and other household needs for very little additional energy cost.

Consider the COWB3 boiler as an efficient option for your home comfort.

COWB3 Boiler

The Beckett® oil burner sets the example for reliable, fuel-efficient heating. That’s the reason why it’s used in the COWB3 boiler. You can plan on years of virtually noiseless performance from this boiler.

  • 85.2% AFUE*
  • Optional, domestic tankless hot water coil provides hot water for almost no cost throughout the wintertime
  • Sealed combustion design keeps noise at an unnoticeable level
  • Swing-out burner door for simple cleaning and maintenance
  • Works 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 pros are always ready to serve the Winchester area. If you’re looking for a new boiler or need maintenance on your existing boiler, call us at 859-745-1564 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.