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| Ultra Series 3-UE Gas Boiler
Ultra Series 3-UE delivers peace of mind, unmatched comfort and immediate payback in energy savings.
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Key Features
- 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
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Efficiency Rating Chart
| 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% | | UG-105 | 105 | 94 | 81 | 2 or 3 in. PVC/CPVC | 95.3% | | UG-155 | 155 | 139 | 123 | 3 in. PVC/CPVC | 95.6% | | UG-230 | 230 | 207 | 183 | 3 or 4 in. PVC/CPVC | 95.4% | | UG-299 | 299 | 270 | 234 | 4 in. PVC/CPVC | 96.4% | | UG-399 | 399 | 365* | 317 | 4 in. PVC/CPVC | 91.7%* |
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