Weil-McLain AB-80C AquaBalance Series 2 80,000 BTU Condensing Gas Combi-Boiler

Weil-McLain AB-80C AquaBalance Series 2 80,000 BTU Condensing Gas Combi-Boiler

Weil-McLain is a leading North American Brand of hydronic comfort heating systems for residential, commercial and institutional buildings, since 1881. Contractors, engineers, architects, homeowners, and facility managers alike rely on Weil-McLain boilers for their comfort heating needs. Installed in homes, offices, schools, restaurants, hotels, and other facilities throughout North America, the Weil-McLain brand is among the most trusted and often used in the building industry.

Features

• Compact design to increase placement options
• Heavy gauge insulated jacket provides quiet operation
• Contractor-friendly removable sides
• Pre-wired, plug-in ready electrical design
• Commercial grade 120V power 6' cord with 3 prong plug
• 24 VAC thermostat relay, fuse protected with prewired terminal strip
• Honeywell control with digital display
• Wall mounting bracket and hardware included
• Unique "3-in-1" vent adapter readily accepts PVC, CPVC, SS, or PP vent materials
• Multiple vent options includes direct vent, 2 pipes or concentric, through roof or sidewall
• Strategically placed sensors used instead of additional bulky boiler controls

What Our Experts Think

• All‑in‑one comfort: The Weil‑McLain AB‑80C AquaBalance Series 2 80,000 BTU Condensing Gas Combi‑Boiler combines high‑efficiency space heating and domestic hot water in a single unit — ideal for homes where space and performance matter.

• Efficient condensing design: Uses condensing technology to extract extra heat from combustion gases, resulting in higher AFUE, lower fuel costs, and reduced emissions.

• Smart, compact package: Space‑saving footprint and integrated design reduce installation complexity compared with separate boiler and water heater systems.

• Quiet & reliable: Smooth combustion, corrosion‑resistant heat exchangers, and accessible service points provide dependable performance and easier maintenance.

Product Q&A

• What is a combi‑boiler?
  A combination boiler that provides both space heating (hydronic baseboards/radiant systems) and domestic hot water from one unit without a separate water heater.

• What fuel does it use?
  Natural gas; qualified HVAC technicians can install an LP (propane) conversion kit if needed.

• Where is it best used?
  Ideal for single‑family homes or smaller multi‑unit residences where compact efficiency and integrated hot water are desirable.

• Does it require special venting?
  Yes — like other condensing units, it uses low‑temperature PVC/CPVC or polypropylene venting to handle cool exhaust and condensate safely.

Maintenance Tips

• Annual professional tune‑up: Have a licensed HVAC technician inspect the burner, heat exchanger, controls, and combustion to ensure safe, efficient operation.

• Check condensate drain: Ensure condensate lines and traps are clear and properly pitched to avoid clogs or freezing.

• Monitor system pressure & water temp: Keep boiler pressure within recommended range; verify expansion tank performance.

• Clean intake & exhaust paths: Keep air intake and vent terminations free of debris to maintain safe airflow.

• Inspect for leaks: Periodically examine valves, fittings, and connections for signs of water or gas leaks.

• Maintain water quality: Use proper inhibitors and schedule periodic system flushing to reduce scale and extend life