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Weil McLain Ultra Oil Boiler

Ultra Oil High Efficiency Condensing Boiler


Category:
  • Optional Advanced Features Module that provides indoor/outdoor reset, DHW priority, stage firing and more
  • Dedicated water-only oil boiler
  • Flexible direct or chimney venting – no power assisted fan needed
  • Reversible swing-away burner door
  • Three-pass cast iron heat exchanger with captured elastomer seals
  • Energy Star Rating
  • 87% AFUE Series 3
Model Burner Cap (GPH) DOE Heating Capacity (MBH) Net AHRI Ratings (MBH) Min. Chimney Size Annual Fuel Utilization

Efficiency (AFUE)

UO-3 (0.80 GPH) 0.80 99 86 8 x 8 87
UO-3 (1.00 GPH) 1.00 123 107 8 x 8 87
UO-4 1.20 148 129 8 x 8 87
UO-5 1.40 173 150 8 x 8 87
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