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

Controlled Comfort HVAC Inc in Carpentersville knows the cold seasons 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 trusty boiler will keep you and your family cozy and even has the option of an attached tankless coil to heat 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 absolutely 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 very little cost throughout the cold season
  • Sealed combustion design keeps noise at an unnoticeable level
  • Swing-out burner door for painless cleaning and maintenance
  • Compatible with traditional radiator systems
  • Cast-iron heat exchanger for lasting reliability
  • 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 happy to serve the Carpentersville area. If you’re looking for a new boiler or need maintenance on your existing boiler, call us at 224-699-9229 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.