Weil-mclain 672619210240 Aquabalance Series 2 Combi Gas Boiler 144 Mbh Stainless Steel Single Tube Heat Exchanger 95% Afue

Product Description

The Weil-McLain 672619210240 AquaBalance Series 2 Combi Gas Boiler is a wall-mount condensing combination boiler designed for residential heating and domestic hot water supply from a single unit. It delivers a full 155,000 BTU per hour heating input with a net BTU heat rating of 144,000 BTU per hour, making it well suited for homes that need reliable space heating and a continuous flow of hot water without the added footprint of a separate water heater. The unit achieves an Annual Fuel Utilization Efficiency of 95 percent, placing it firmly in the high-efficiency condensing category and making it eligible for Energy Star compliance. HVAC technicians and plumbers will appreciate the 10-to-1 turndown ratio, which allows the boiler to modulate output across a wide range and match actual heating demand rather than short-cycling at full fire. This improves comfort, reduces wear on components, and lowers fuel costs over the heating season. The heat exchanger is constructed from large-diameter 316L stainless steel single-tube design, a material chosen for its resistance to corrosion and thermal stress in condensing applications where flue gas temperatures drop below the dew point. Domestic hot water flow is rated at 4 gallons per minute at a 70-degree Fahrenheit temperature rise, providing a steady and consistent supply for typical household use. The boiler operates on natural gas with spark ignition and runs on 120 volts single-phase power. Venting is direct vent compatible with PVC, CPVC, stainless steel, or select polypropylene materials, giving installers flexibility to match existing vent runs or new construction requirements. Supply and return pipe connections are both 1 inch. The compact wall-mount profile and removable side panels simplify installation in tight mechanical rooms or utility closets. The package includes a water treatment inhibitor and test kit to protect the hydronic system from the start. Simple user-friendly controls reduce commissioning time and make adjustments straightforward for service technicians in the field.

• 95% AFUE condensing efficiency with a 10-to-1 turndown ratio for precise modulation and reduced short-cycling
• 316L stainless steel single-tube heat exchanger provides corrosion resistance and long-term durability in condensing operation
• Combination boiler supplies both space heating and domestic hot water at 4 gpm with a 70-degree Fahrenheit rise from one wall-mount unit

Product Highlights

The Weil-McLain AquaBalance Series 2 Combi Boiler combines high-efficiency condensing performance with domestic hot water production in a compact, installer-friendly wall-mount package rated for residential applications. Its 95% AFUE rating, flexible direct vent options, and stainless steel heat exchanger make it a practical choice for high-efficiency hydronic system upgrades or new installations.

Product Information

Standard Information

• Brand: WEIL-MCLAIN
• Manufacturer Part Number: 672619210240

Technical Specifications

• Collection: AquaBalance Series 2
• Boiler Type: Combi Boiler
• Application: Residential
• Fuel Type: Natural Gas
• AFUE: 95%
• Heating Input: 155 MBH (155,000 BTU per hour)
• BTU Heat Rating: 144,000 BTU per hour
• Domestic Hot Water Flow Rate: 4 gpm at 70 degrees Fahrenheit rise
• Turndown Ratio: 10 to 1
• Heat Exchanger Material: 316L Stainless Steel Single Tube
• Installation Type: Wall Mount
• Vent Type: Direct Vent
• Ignition System: Spark Ignition
• Voltage: 120V
• Phase: Single Phase
• Supply Pipe Connection Size: 1 inch
• Return Pipe Connection Size: 1 inch
• Media: Hot Water
• Height: 27-9/16 inches
• Width: 16-13/24 inches
• Depth: 12-3/5 inches
• ASME Certified: ASME H
• Energy Star Compliant: Yes
• CEC Compliant: For Sale in CA