Weil-McLain 383100055
Weil-McLain 383100055
Weil-McLain 383100055
Weil-McLain 383100055
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Weil-McLain 383100055
Weil-McLain 383100055
Weil-McLain 383100055

Weil-McLain AquaBalance™ AB-155-H - 144K BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent



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Weil-McLain AquaBalance™ AB-155-H - 144K BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent
Weil-McLain AquaBalance™ AB-155-H - 144K BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent
Model: 383100055
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Recommended Accessories

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Expert Recommended Accessories Selected by Bob, our Expert
Required Accessories 9
These accessories are required to properly setup/install this product.
Optional Accessories 10


    Over the last 130 years, Weil-McLain has built a reputation of designing some of the most reliable boilers in the marketplace. Their dedication to producing long-lasting heating solutions is seen in every boiler they make. Weil-McLain's AquaBalance™ hot water boiler is highly efficient, compact, and remarkably versatile. Using condensing technology, the AquaBalance™ will reuse heat that escapes from conventional boilers, providing greater efficiency. Simple design along with Honeywell® controls make the AquaBalance™ easy to install and easy to use. With a 95% AFUE, Low Nox certification, and a 10:1 turndown ratio, the AquaBalance™ AB-155-H makes comfort and efficiency more accessible than ever before.
  • High Efficiency Heating
  • Weil-McLain's rigorous standards of boiler efficiency are clearly shown in the AquaBalance™ Combi line. The AB-155-H features a stainless steel, titanium heat exchanger which allows for an impressive 95% AFUE.
  • Easy Installation
  • The AquaBalance™ comes pre-wired with a plug-in ready electrical design. Fewer pipes and connection points streamline the installation process, allowing you to get the system up and running quickly.
  • Compact Design
  • The AquaBalance's™ compact design is small enough to fit in a closet; a perfect solution for families living in smaller homes or apartments. It also features a heavy gauge insulated jacket to provide extremely quiet operation.
  • Outdoor Reset Control
  • An outdoor reset sensor is included with every AquaBalance™ boiler. This sensor allows your boiler temperature to be adjusted relative to the temperature outside, eliminating excess energy use and guaranteeing comfort.
  • Contractor Friendly
  • Along with simple installation, the AquaBalance™ also features removable sides panels. This makes all of the internal components very accessible, allowing for quick and easy service.
  • Product Includes
  • (1) Weil-McLain AquaBalance™ AB-155-H Hot Water Boiler
  • (1) Outdoor Temperature Sensor
  • (1) Mounting Bracket & Hardware
  • (1) 3-in-1 Vent Adapter
  • Product Note
    Compatible NG to LP Conversion Kit: Weil-McLain 640-000-083
California residents see
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm..
For more information go to: www.p65Warnings.ca.gov


specs product image PID-94358
General Information
Product Line
Product Sub-line
Series 2
Medium Learn More
Hot Water
Fuel Type Learn More
Natural Gas
Combustion Type Learn More
Vent Type Learn More
Direct Vent
DHW Production Learn More
Modulating/Staging Learn More
Mount Type
Minimum Altitude
0 Feet
Maximum Altitude
10000 Feet
Includes Pump
Assembly Type
Gas Conversion Kit
AFUE Learn More
95 %
Maximum Input Capacity Learn More
155000 BTU
Minimum Input Capacity
15500 BTU
DOE Heating Capacity Learn More
144000 BTU
Net I=B=R Capacity Learn More
125000 BTU
Ultra Low NOx Emissions Learn More
Low NOx Emissions Learn More
Turndown Ratio
Electrical Data
60 Hz
Flue Connection Size
3 Inches
Gas Connection Size
1/2 Inch
Boiler Supply
1 Inch
Boiler Return
1 Inch
Product Height
27 9/16 Inches
Product Width
16 13/24 Inches
Product Depth
12 29/48 Inches
Product Weight
67 Pounds
Shipping Weight
77 Pounds
Energy Star Listed
CSA Listed
ASME Certified
AHRI Certified
AHRI Reference Number
Warranty Information
Parts Warranty Learn More
2 Years
Heat Exchanger Warranty
10 Years


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Weil-McLain AquaBalance™ AB-155-H - 144K BTU - 95% AFUE - Hot Water Gas Boiler - Direct Vent
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