Find a Lennox Dealer near you for innovative solutions to all your home comfort needs.
Lennox Residential
Email SignupSign up for email news
GWB8-IE Boiler

GWB8-IE Boiler

Standard-efficiency, gas-fired water boiler

The GWB8-IE boiler is full of features that provide years of heating benefits, including a cast-iron heat exchanger and titanium burners. With efficiency ratings of up to 84.4%, the GWB8-IE can also deliver significant energy savings, compared to an older boiler.


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

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

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
  • Titanium burners—provide greater resistance to corrosion and oxidation than competitive stainless or aluminized stell burners
  • Versatile installation—available in six sizes for installation virtually anywhere in the home, and can be fueled by natural or LP* gas

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-IE Product Literature

Product Brochures


GWB8-IE Boiler Product Brochure

Installation Manuals


GWB8-IE Boiler Installation Manual


*Shipped as natural gas; convertible to LP.

Recognitions and Certifications

ASME AHRI Certified CSA Approved (US) CSA Design Certified

© 2015 Lennox International Inc.