Weil-McLain is a leading designer, manufacturer and marketer of heating and cooling equipment in residential, commercial and institutional buildings. Building on a tradition of quality and innovation, their mission to design and build the best products on the market, to make them first and to make them last—for decades.

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Ultra Series 3 delivers peace of mind, unmatched comfort and immediate payback in energy savings.

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