Gas-Fired Water Boilers Provide Years of Efficient Heat.

Gas-fired water boilers deliver comfortable, even heat almost silently. What’s more is their excellent energy efficiency. At KDM Service Corporation in Tuscaloosa, most all of the Lennox® gas-fired water boilers we sell are ENERGY STAR® qualified.

Read more 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 earned a 95% AFUE rating.* To get the most fuel savings, it is equipped with an electronic ignition control that turns on the burner to meet your household demand to be sure it uses only the energy it needs to keep your home warm.

  • Strong, self-cleaning, stainless steel heat exchanger changes 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 resists 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 carries heat quickly—potentially three times faster than a conventional cast-iron exchanger.

  • Durable, heavy-gauge steel cabinet with baked-on paint finish
  • Compact design for installation flexibility
  • Sealed combustion minimizes noise
  • Electronic ignition controls water temperature and turns on the burner only when needed
  • Burns natural gas or can be converted 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

With an 84.4% efficiency rating,* the GWB8-IE boiler is significantly more efficient than an older boiler—plus, it works with traditional radiator systems.

  • Electronic ignition monitors water temperature and turns on the burner only when needed
  • Thick fiberglass insulation greatly reduces off-cycle heat and energy loss
  • Cast-iron heat exchanger and titanium burners constructed for years of reliability
  • Available in six different sizes for ultimate installation flexibility
  • Burns natural gas or can convert 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

With its durable cast-iron heat exchanger and long-lasting stainless steel burners, this standard-efficiency boiler can perform for years.

  • Electronic ignition monitors water temperature and turns on the burner only when needed
  • Thick fiberglass insulation minimizes off-cycle heat and energy loss
  • Compatible with conventional radiator systems
  • Comes 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

Reach us at 205-758-2703 or schedule an appointment online so our staff at KDM Service Corporation in Tuscaloosa can help you find the right boiler for you, or fix your boiler so it is running as smoothly and efficiently as possible.