- Fuel: Gas
- System: Hot Water
- Combustion: Natural Draft, atmospheric
- Capacity: 5 sizes, 70 – 210 MBH Input
- Efficiency: up to AFUE 82.3%
The Sentinel boiler is a hot water gas boiler with a heat exchanger which has for years been a “workhorse” of the heating industry. The Sentinel is available for use with propane or natural gas. This boiler is popular with many heating contractors for performance and reliability.