- Gas fired water boiler with cast aluminum heat exchanger
- Venturi mixing body mixes air and gas providing higher efficiency
- Designed to operate in low temperature condensing applications
- Outdoor reset and domestic hot water priority standard
- Negative regulated gas valve precisely delivers gas to the boiler
- U-Control gives you the power for easy set-up and maintenance
- Modulates with 5 to 1 turn-down ratio capability
- Variable speed motor matches combustion output to heating needs
- High grade stainless steel burner features quiet operation, high efficiency, and cleaner combustion for low NOx applications
*** NOTICE - See AHRI Press Release. AHRI, the independent ratings association for the Heating and Cooling industry, is in the process of modifying their industry testing parameters for residential modulating condensing boilers sold in North America. As such, Weil-McLain has temporarily defaulted our AFUE ratings to 90% (as requested by AHRI) until such time that a new rating and test procedure can be established and approved by the Department of Energy. We anticipate new published ratings by the end of the December. Please note that this does not affect any changes or reliability of the products themselves, only the published ratings.
Click Here for AHRI’s full Press Release| Model | A.G.A. Input (MBH) | DOE Heating Capacity (MBH) | Net I=B=R Ratings (MBH) | Min. Vent Size | Annual Fuel Utilization Efficiency (AFUE) |
|---|
| UG-80 | 80 | 71 | 62 | 2 or 3 in. PVC/CPVC | 95.2% (***See Note Below) |
| UG-105 | 105 | 94 | 81 | 2 or 3 in. PVC/CPVC | 95.3% (***See Note Below) |
| UG-155 | 155 | 139 | 123 | 3 in. PVC/CPVC | 95.6% (***See Note Below) |
| UG-230 | 230 | 207 | 183 | 3 or 4 in. PVC/CPVC | 95.4% (***See Note Below) |
| UG-299 | 299 | 270 | 234 | 4 in. PVC/CPVC | 96.4% (***See Note Below) |
| UG-399 | 399 | 365* | 317 | 4 in. PVC/CPVC | 91.7%* (***See Note Below) |
*Combustion Efficiency
*** NOTICE - See AHRI Press Release. AHRI, the independent ratings association for the Heating and Cooling industry, is in the process of modifying their industry testing parameters for residential modulating condensing boilers sold in North America. As such, Weil-McLain has temporarily defaulted our AFUE ratings to 90% (as requested by AHRI) until such time that a new rating and test procedure can be established and approved by the Department of Energy. We anticipate new published ratings by the end of the December. Please note that this does not affect any changes or reliability of the products themselves, only the published ratings.
Click Here for AHRI’s full Press Release
Sentinel X100 Water Treatment included with boiler
Click here for more information on Sentinel products
