Ultra Series 3 Gas Boiler

Ultra Series 3 Gas Boiler:

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
  • 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
  • Ultra 310 93.3% efficient rating is a gross output and combustion efficiency