Weil-McLain AB-80H AquaBalance Series 2 80,000 BTU Heat-Only Condensing Gas 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
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High-efficiency performance: The Weil-McLain AB-80H AquaBalance Series 2 80,000 BTU Heat-Only Condensing Gas Boiler delivers condensing efficiency that maximizes fuel use and lowers operating costs.
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Heat-only design: Focused solely on hot-water production without domestic hot water integration β ideal when a separate water heater is used or required.
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Reliable & quiet: Smooth combustion and advanced controls provide consistent comfort with minimal noise.
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Built for durability: Condensing heat exchanger and well-engineered components provide long, dependable service.
Product Q&A
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What type of boiler is this?
A high-efficiency condensing gas boiler designed to heat hydronic systems (radiators, baseboards, radiant floors).
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What does βheat-onlyβ mean?
It only heats space-heating water β domestic hot water must be supplied by a separate water heater or indirect tank.
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What fuel does it use?
Natural gas (propane conversion kits are available separately via qualified HVAC techs).
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Is this suitable for residential use?
Yes β ideal for homes or small commercial spaces needing reliable heating without domestic hot water integration.
Maintenance Tips
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Annual professional service: Have a licensed HVAC technician inspect and tune the boiler yearly β check burner, heat exchanger, and combustion efficiency.
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Check condensate drain: Make sure condensate lines run clear and have proper slope to avoid buildup or freeze issues.
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Monitor system pressure: Maintain correct water pressure and top up or adjust expansion tank as needed.
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Clean intake & venting: Keep air intake and vent terminations free of debris to ensure safe combustion airflow.
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Inspect for leaks: Periodically check around connections, valves, and piping for signs of water or gas leaks.
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Maintain water quality: Use recommended inhibitors and periodic flushing to reduce corrosion and scale buildup.
Damage 
Loss 
Theft 
