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Ultra Gas S3 CT Gas Boiler

Ultra Gas S3 CT Gas Boiler

  • 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
  • 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

Technical Data

Model AFUE (%) CSA Input (MBH) DOE Heating Cap. (MBH) Net AHRI (MBH) Vent Size (in.)
UG-80 93.5 80 71 62 2 or 3
UG-105 94 105 94 81 2 or 3
UG-155 94 155 139 123 3
UG-230 94.1 230 207 183 3 or 4
UG-299 92.5 299 270 234 4
UG-399 91.7* 399 365* 317 4

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