Relax with Reliable Comfort Season After Season.

Effective Service Group, LLC. in East Hanover knows the cold seasons seem to be endless, but we can help you stay cozy and warm. Our sturdy Lennox® oil-fired water boiler is just what you need. It will keep you warm and even has the option of an attached tankless coil to produce hot water for your showers, laundry and other household requirements 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 bar for reliable, fuel-efficient heating. That’s the reason why it’s used in the COWB3 boiler. Your family can plan on years of almost silent 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 very low
  • Swing-out burner door for easy 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 always ready to serve the East Hanover area. If you’re looking for a new boiler or need maintenance on your home’s boiler, call us at 973-884-0065 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.