- Up to 82.7% AFUE
- Cast iron heat exchanger
- Gas-fired models
- Water or steam models
- Standard standing pilot or optional electronic ignition
- Electric vent damper
- Stainless steel/titanium alloy composite burners
- Compact design
- 5-year parts limited warranty and a 12-year parts limited warranty on heat exchanger section
Legacy™ Line BS2 Boiler BS2
Provides traditional gas-fired, steam output, cast iron reliability plus an up to 82.7% AFUE rating for superior energy efficiency. You’ll enjoy a higher level of whole-home comfort plus lower utility bills
AFUE Efficiency: Up to 82.7%