Enjoy Cozy, Quiet, Efficient Heat for Years to Come with a Gas-Fired Boiler.

Gas-fired water boilers deliver comfortable, even heat with little to no noise. What’s even better is their excellent energy efficiency. At Custom Sheetmetal & Roofing, Inc. in Topeka, most all of the Lennox® gas-fired water boilers we offer are ENERGY STAR® qualified.

Learn about the benefits of our high-efficiency boilers.

GWM-IE Boiler

Forty percent more efficient than conventional boilers, this gas-modulating condensing water boiler is ENERY STAR® qualified. As a matter of fact, it carries a 95% AFUE rating.* To maximize fuel savings, it features an electronic ignition control that turns on the burner to coordinate with your household demand to ensure it uses only the energy it needs to keep your home warm.

  • Strong, self-cleaning, stainless steel heat exchanger turns waste energy into usable heat
  • Sealed combustion keeps noise at a minimum
  • To meet your comfort needs, the modulating capacity allows the burner to fire as low as 20% of capacity
  • Stainless steel mesh burner resists corrosion and oxidation
  • CPVC flue condensate collector is corrosion-resistant and eliminates 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—potentially three times faster than a typical cast-iron exchanger.

  • Durable, heavy-gauge steel cabinet with baked-on paint finish
  • Condensed design for installation flexibility
  • Sealed combustion keeps noise at a minimum
  • Electronic ignition controls water temperature and ignites the burner only when necessary
  • 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

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

  • Electronic ignition controls water temperature and lights the burner only when needed
  • Thick fiberglass insulation minimizes off-cycle heat and energy loss
  • Cast-iron heat exchanger and titanium burners constructed for years of durability
  • Offered 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

This standard-efficiency boiler can perform for years to come with its long-lasting cast-iron heat exchanger and durable stainless steel burners.

  • Electronic ignition controls water temperature and lights the burner only when needed
  • Thick fiberglass insulation significantly reduces 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 convert 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

Give us a call at 785-357-6200 or schedule an appointment online so our experts at Custom Sheetmetal & Roofing, Inc. in Topeka can help you find the right boiler for you, or ensure your existing boiler is running as smoothly and efficiently as possible.