Relax with Reliable Comfort Season After Season.

WM J Kraus & Son in Keokuk knows the colder months seem to be endless, but we can help you stay comfy and warm. Our reliable Lennox® oil-fired water boiler is just what you need. This boiler will keep you and your family warm and even has the option of an attached tankless coil to produce hot water for your showers, laundry and other household uses for a low additional energy cost.

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

COWB3 Boiler

The Beckett® oil burner sets the standard for reliable, fuel-efficient heating. That’s absolutely 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 a very small cost throughout the cold season
  • Sealed combustion design keeps noise very low
  • Swing-out burner door for simple cleaning and maintenance
  • Compatible 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 are here to serve the Keokuk area. If you’re looking for a new boiler or need maintenance on your current boiler, call us at 319-524-3714 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.