If your home has hot water radiators in each room for heat, you have a boiler to heat the water. Viessmann offers tailor-made system solutions for all energy sources for use in residential homes and apartment buildings. We offer a complete line of gas and oil boilers starting at 86.9% AFUE and up.

Gas Boiler Product Offering


Aluminum Gas Boiler

Model Family: GenGBAlum
Annual Fuel Utilization Efficiency: Up to 94.1% AFUE
Energy Star Rated: N/A
Heat Exchanger Warranty: Limited warranty upon timely registration.
Warranty: Limited warranty upon timely registration.
Manufacturer's Stated Benefits:
  • Gas fired water boiler with cast aluminum heat exchanger
  • Designed to operate in low temperature condensing applications
  • High grade stainless steel burner features quiet operation