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

Dial One Mears Air Conditioning & Heating Inc in Phoenix knows the winters seem to go on forever, but we can help you stay comfy and warm. Our sturdy Lennox® oil-fired water boiler is just what you need. This trusty boiler will keep you and your family warm and even has the option of an attached tankless coil to heat 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 bar 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 winter months
  • Sealed combustion design keeps noise at a minimum
  • Swing-out burner door for simple cleaning and maintenance
  • Functions with traditional radiator systems
  • Cast-iron heat exchanger for lasting performance
  • 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 Phoenix area. If you’re looking for a new boiler or need maintenance on your current boiler, call us at 602-997-5701 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.