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

With a reliable Lennox® oil-fired water boiler from Air Houston Mechanical LLC in Humble, you’ll stay warm and snug—even on winter’s most bone-chilling days. And, by adding an optional tankless coil, your high-efficiency boiler can also make hot water for all your household needs, at virtually no cost during the winter months.

Find out more about what the COWB3 boiler has to offer.

COWB3 Boiler

You will enjoy years of quiet heating from the COWB3 boiler. It is made with the Beckett® oil burner, which sets the bar for dependable fuel-efficient heating.

  • 85.2% AFUE*
  • Optional, domestic tankless hot water coil provides hot water for very little cost throughout the winter months
  • Sealed combustion design keeps noise at an unnoticeable level
  • Swing-out burner door for painless cleaning and maintenance
  • Works 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 pros at Air Houston Mechanical LLC are available to help with all your boiler needs, whether you’re looking for a new boiler or boiler maintenance. Call our Humble location at 832-777-1521 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.