- Super condensing efficiency
- Patented compact stainless steel fire tube heat exchanger
- PVC exhaust venting capable: 2″ up to 60′; 3” up to 150’
- ½” Gas pipe up to 24′ (Subject to local code)
- TDR 10:1
- Advanced user interface and controls
NFB-175
HIGH EFFICIENCY CONDENSING HEATING BOILER