Gas-Fired Water Boilers Provide Years of Efficient Heat.

Gas-fired water boilers deliver comfortable, even heat with little to no noise. What’s even better is their excellent energy efficiency. At Kowalski Heating & Cooling in McMurray, many of the Lennox® gas-fired water boilers we sell are ENERGY STAR® qualified.

Learn about the features of our high-efficiency boilers.

GWM-IE Boiler

This ENERGY STAR® qualified, gas-modulating condensing water boiler is 40% more efficient than conventional boilers. Not surprisingly, it boasts a 95% AFUE rating.* To maximize fuel savings, it features an electronic ignition control that turns on the burner to match your household demand to make sure it uses only the energy it needs to keep you comfortable.

  • Strong, self-cleaning, stainless steel heat exchanger turns waste energy into usable heat
  • Sealed combustion reduces noise
  • By allowing the burner to fire as low at 20% of its capacity, it’s modulating capability perfectly meets your comfort needs
  • Stainless steel mesh burner combats corrosion and oxidation
  • CPVC flue condensate collector is corrosion-resistant and removes the use of metal in the venting area.
  • 15-year limited warranty on heat exchanger, 10-year limited warranty on remaining covered components
GWM-IE Boiler
Efficiency Rating (AFUE): up to 95
Energy Star badge

GWB9-IH Boiler

The GWB9-IH boiler is easy to integrate with a traditional radiator system and is ENERGY STAR qualified with an AFUE rating of 90%.* Its cast-aluminum heat exchanger moves heat quickly—up to three times faster than a typical cast-iron exchanger.

  • Enduring, heavy-gauge steel cabinet with baked-on paint finish
  • Small design for installation flexibility
  • Sealed combustion reduces noise
  • Electronic ignition controls water temperature and turns on the burner only when it is needed
  • Burns natural gas or can convert to LP gas
  • 15-year limited warranty on heat exchanger, 10-year limited warranty on remaining covered components
GWB9-IH Boiler
Efficiency Rating (AFUE): up to 90
Energy Star badge

GWB8-IE Boiler

Significantly more efficient than an older boiler, the GWB8 boiler has an 84.4% efficiency rating*—it also works with older radiator systems.

  • Electronic ignition monitors water temperature and turns on the burner only when needed
  • Thick fiberglass insulation significantly reduces off-cycle heat and energy loss
  • Cast-iron heat exchanger and titanium burners constructed for years of reliability
  • Offered in six different sizes for ultimate installation flexibility
  • Burns natural gas or convertible to LP gas
  • 20-year limited warranty on heat exchanger, 1-year limited warranty on remaining covered parts
GWB8-IE Boiler
Efficiency Rating (AFUE): up to 84.4

GWB8-E Boiler

Built with a long-lasting cast-iron heat exchanger and durable stainless steel burners, this standard-efficiency boiler can perform year after year.

  • Electronic ignition monitors water temperature and turns on the burner only when needed
  • Thick fiberglass insulation minimizes off-cycle heat and energy loss
  • Works with traditional radiator systems
  • Available in nine different sizes for installation anywhere in your home
  • Burns natural gas or can be converted to LP gas
  • 20-year limited warranty on heat exchanger, 1-year limited warranty on remaining covered parts
GWB8-E Boiler
Efficiency Rating (AFUE): up to 83.9

Call us at 724-745-7404 or schedule an appointment online so our staff at Kowalski Heating & Cooling in McMurray can help you find the right boiler for you, or ensure your existing boiler is working as well as it should be.