Lennox Boilers

GWB9-IH Boiler

The GWB9-IH boiler offers an AFUE rating of 90%, which means it converts a full 90% of your fuel into usable heat. And it delivers warmth quickly with a cast-aluminum heat exchanger that transfers heat three times faster than conventional cast iron.


Product Features

Energy Efficiency

- Cast-aluminum heat exchanger—transfers heat up to three times faster than traditional cast iron exchangers ENERGY STAR® qualified—meets or exceeds EPA guidelines for energy efficiency, which means energy savings Electronic ignition control—monitors water temperature and maximizes efficiency by turning on the burner only when needed.

Home Comfort

- Sealed combustion—minimizes fan noise and provides quiet, soothing heat Easy integration—low temperature supply and return water makes the unit compatible with existing radiant and underfloor systems

Reliable Performance

- Durable cabinet—heavy-gauge steel cabinet and baked-on paint finish Compact and versatile—allows easy installation in a basement, closet or alcove enclosure, and can be fueled by natural or LP* gas