Relax with Reliable Comfort Season After Season.

With a dependable Lennox® oil-fired water boiler from Arrings A/C & Heating in Humble, you’ll stay cozy and warm—even on winter’s most bitter days. And, when you add an optional tankless coil, your high-efficiency boiler can also heat 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

Expect years of quiet heating from the COWB3 boiler. It is made with 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 almost no cost throughout the wintertime
  • Sealed combustion design keeps noise at an unnoticeable level
  • Swing-out burner door for easy cleaning and maintenance
  • Functions 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 pros at Arrings A/C & Heating are here for you to help with all your boiler needs, whether you want a new boiler or boiler maintenance. Call our Humble location at 281-713-8304 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.