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

With a reliable Lennox® oil-fired water boiler from Olde Towne Heating & Air in Mount Pleasant, you’ll stay cozy and warm—even on winter’s most bitter days. Also, when you add 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.

Read more about the COWB3 boiler.

COWB3 Boiler

You will enjoy years of near-silent operation from the COWB3 boiler. It includes the Beckett® oil burner, which is the standard for reliable fuel-efficient heating.

  • 85.2% AFUE*
  • Optional, domestic tankless hot water coil delivers hot water for a very small cost throughout the wintertime
  • Sealed combustion design keeps noise at a minimum
  • Swing-out burner door for easy cleaning and maintenance
  • Works 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 at Olde Towne Heating & Air are here for you to help with all your boiler needs, whether you need a new boiler or boiler maintenance. Call our Mount Pleasant location at 843-856-1433 today, or make 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.