Gas-Fired Water Boilers Provide Years of Efficient Heat.

Gas-fired water boilers offer comfortable, even heat very little noise. What’s even better is their high-level energy efficiency. At Air Houston Mechanical LLC in Huffman, most all of the Lennox® gas-fired water boilers we carry are ENERGY STAR® qualified.

Learn about the features of our high-efficiency boilers.

GWM-IE Boiler

This gas-modulating condensing water boiler is ENERGY STAR® qualified and 40% more efficient than conventional boilers. Not surprisingly, it boasts 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 make sure it uses only the energy it needs to keep you warm.

  • Durable, self-cleaning, stainless steel heat exchanger turns waste energy into usable heat
  • Sealed combustion keeps noise at a minimum
  • Modulating capability perfectly meets your comfort needs by allowing the burner to fire at as low as 20% of its capacity
  • 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 transfers heat quickly—up to three times faster than a traditional cast-iron exchanger.

  • Enduring, heavy-gauge steel cabinet with baked-on paint finish
  • Compact design for flexibility in installation
  • Sealed combustion keeps noise at a minimum
  • Electronic ignition controls water temperature and lights the burner only when it is 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—it even works with conventional radiator systems.

  • Electronic ignition oversees water temperature and lights the burner only when needed
  • Thick fiberglass insulation significantly reduces off-cycle heat and energy loss
  • Cast-iron heat exchanger and titanium burners engineered for years of durability
  • Comes 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

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 oversees water temperature and lights the burner only when needed
  • Thick fiberglass insulation minimizes off-cycle heat and energy loss
  • Compatible with traditional 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 832-777-1521 or schedule an appointment online so our staff at Air Houston Mechanical LLC in Huffman can help you find the right boiler for you, or fix your boiler so it is working as well as it should be.