Relax with Reliable Comfort Season After Season.

McNatt Inc in Corpus Christi 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 can help. This boiler will keep your home cozy and even has the option of an attached tankless coil to provide hot water for your showers, laundry and other household needs for a low additional energy cost.

The COWB3 boiler is an efficient option for your home comfort.

COWB3 Boiler

The Beckett® oil burner sets the example for reliable, fuel-efficient heating. That’s the reason 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 very little cost throughout the wintertime
  • Sealed combustion design keeps noise at an unnoticeable level
  • Swing-out burner door for simple cleaning and maintenance
  • Compatible 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 experts are here to serve the Corpus Christi area. If you’re looking for a new boiler or need maintenance on your current boiler, call us at 361-888-4808 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.