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GWB8-E Boiler

GWB8-E Boiler

Standard-efficiency, gas-fired water boiler

Constructed of high-quality materials, including a cast iron heat exchanger and stainless steel burners, the GWB8-E boiler delivers reliable heating performance season after season.


Here are some of the top features of the GWB8-E:

Electronic ignition control burns fuel only as necessary, reducing energy costs.

Cast iron heat exchanger designed for long-lasting durability.

Easy integration with traditional radiator systems to provide precise heating comfort, regardless of outdoor temperatures.


Features and Benefits

Energy Efficiency

  • Electronic ignition control—monitors water temperature and maximizes efficiency by turning on the burner only when needed
  • Thick fiberglass insulation—minimizes off-cycle heat and energy loss
  • Vent damper—automatically closes when the boiler turns off, maintaining energy efficiency

Home Comfort

  • Easy integration—works with traditional radiator systems to provide precise heating comfort, regardless of outdoor temperatures

Reliable Performance

  • Cast iron heat exchanger—designed for years of long-lasting reliability
  • Versatile installation—available in nine sizes for installation virtually anywhere in the home, and can be fueled by natural* or LP gas
  • Stainless steel burners—provide greater resistance to corrosion and oxidation**

Warranty and Specs

Warranty and Specs

  • 20-Year Limited Warranty on heat exchanger
  • 5-Year Limited Warranty on covered components
  • This product may be eligible for valuable 10-year Limited Extended Warranty coverage with product registration

GWB8-E Product Literature

Product Brochures


GWB8-E Boiler Product Brochure

Installation Manuals


GWB8-E Boiler Installation Manual


*Shipped as natural gas; convertible to LP. **262 and 299 models feature Titanium Burners.

Recognitions and Certifications

ASME AHRI Certified CSA Approved (US) CSA Design Certified

© 2015 Lennox International Inc.