Relax with Reliable Comfort Season After Season.

iTemp Heating and Air Conditioning in Chicago knows the colder months seem to drag on for months, but we can help you stay comfy and warm. Our sturdy Lennox® oil-fired water boiler is just what you need. This boiler will keep your home cozy and even has the option of an attached tankless coil to heat water for your showers, laundry and other household needs for not much additional energy cost.

For an efficient home comfort option, look at the COWB3 boiler.

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 almost silent 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 at an unnoticeable level
  • Swing-out burner door for easy 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 experts are happy to serve the Chicago area. If you’re looking for a new boiler or need maintenance on your existing boiler, call us at 773-704-0640 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.