Relax with Reliable Comfort Season After Season.

With a reliable Lennox® oil-fired water boiler from Effective Service Group, LLC. in East Hanover, you’ll stay warm and toasty—even on winter’s harshest days. And, with the addition of an optional tankless coil, your high-efficiency boiler can also make hot water for all your household needs, for very little money during the winter months.

See what the COWB3 boiler has to offer.

COWB3 Boiler

Expect years of near-silent performance from the COWB3 boiler. It features the Beckett® oil burner, which is the standard for dependable fuel-efficient heating.

  • 85.2% AFUE*
  • Optional, domestic tankless hot water coil delivers hot water for very little cost throughout the wintertime
  • Sealed combustion design keeps noise at a minimum
  • Swing-out burner door for painless 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 at Effective Service Group, LLC. are available to take care of all your boiler needs, whether you want a new boiler or boiler maintenance. Call our East Hanover location at 973-884-0065 today, or schedule 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.