Weil-McLain AB-120C AquaBalance Series 2 120,000 BTU Condensing Gas Combi-Boiler

  • 10:1 TDR
  • 95% AFUE
  • 3.2 GPM DHW Flow at 70° Rise
  • AHRI Certified
  • Energy Star Certified and Low NOx SCAQMD Compliant

Save $552.20
Weil-McLainSKU: W383100040

Retail price:Wholesale price:
Wholesale price$3,313.16 Sale price$2,760.96

As low as $68.33 per month


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.


  • 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


In residential installations, this unit comes with a 10-year heat exchanger and 2-year parts limited manufacturer's warranty when the boiler is registered with Weil McLain. For commercial installations, this unit comes with a 5-year heat exchanger and 2-year parts limited manufacturer's warranty.



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