Weil-mclain 672619208988 Ultra Series 4 Condensing Hot Water Gas Boiler 155 Mbh 94% Afue Floor Mount

Product Description

The Weil-McLain 672619208988 is a high-efficiency modulating condensing hot water gas boiler from the Ultra Series 4 collection. It is designed for residential floor-mount installation and delivers dependable hydronic heating performance with a 94% AFUE rating. That means 94 cents of every dollar spent on fuel goes directly toward heating your home or building. The unit has a 155 MBH input capacity and a 139,000 BTU per hour heat output rating, making it well-suited for larger residential heating loads. The cast aluminum nano-coated heat exchanger resists corrosion and transfers heat efficiently, extending the service life of the boiler and reducing long-term maintenance costs. The high-grade stainless steel burner operates quietly and handles both natural gas and propane fuel types, giving installers flexibility on various job sites. A modulating design with a 5:1 turn-down ratio allows the boiler to match its output closely to the actual heating demand, which reduces short cycling and improves overall system efficiency. The U-Control interface makes setup and commissioning straightforward for HVAC technicians. It supports temperature management for up to 3 separate set points and allows multiple boilers to be controlled from a single panel, which is a major advantage in zoned or multi-unit residential applications. The system includes outdoor reset capability and domestic hot water priority, two features that further optimize energy use throughout the heating season. Venting is compatible with PVC, CPVC, and polypropylene pipe, giving installers common and cost-effective options. The boiler is CSA certified, ASME compliant, Energy Star compliant, and approved for sale in California under CEC standards. It operates on single-phase 120V power with spark ignition. Supply and return pipe connections are both 1 inch. Boiler circulators are included with the unit, reducing the need for additional components at installation. The slate gray jacket cover gives it a clean, professional appearance on the job site.

• Cast aluminum nano-coated heat exchanger for long-lasting corrosion resistance and efficient heat transfer
• Modulating condensing operation with 5:1 turn-down ratio reduces short cycling and lowers fuel costs
• Compatible with PVC, CPVC, and polypropylene venting for flexible installation options

Product Highlights

The Weil-McLain Ultra Series 4 condensing gas boiler combines a 94% AFUE rating with modulating output and multi-zone control capability, making it a reliable choice for residential hydronic heating systems that demand efficiency and precise temperature management.

Product Information

Standard Information

• Brand: WEIL-MCLAIN
• Manufacturer Part Number: 672619208988

Technical Specifications

• Collection: Ultra Series 4
• Application: Residential
• AFUE: 94%
• Input Capacity: 155 MBH
• Heat Output: 139,000 BTU per hour
• Fuel Type: Natural Gas, Propane
• Condensing: Yes
• Ignition System: Spark Ignition
• Venting: Direct Vent, PVC, CPVC, Polypropylene
• Installation Type: Floor Mount
• Voltage: 120V
• Phase: Single Phase
• Material: Cast Aluminum
• Supply Pipe Connection Size: 1 inch
• Return Pipe Connection Size: 1 inch
• Zones Supported: 3
• Height: 43 and 1/16 inches
• Width: 22 and 13/16 inches
• Depth: 19 and 15/16 inches
• ASME Compliant: Yes
• CSA Certified: Yes
• Energy Star Compliant: Yes
• CEC Compliant: Approved for sale in California