Description
Weil-McLain CGi-5 Series 4 119,000 BTU Cast Iron Natural Gas Boiler – W381359006
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
- Gas fired water boiler with cast iron sections
- Natural draft and direct exhaust capability
- Can be used with natural or propane gas
- Now with built-in low water cut off functionality
- Compact design saves valuable living space
- No vertical draft hood and no mechanical vent damper
- Intermittent electronic ignition with standard components for easy servicing
What Our Experts Think
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Reliable Cast Iron Construction: Durable cast iron sections resist corrosion and thermal stress for long service life
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119,000 BTU Heating Output: Ideal for residential and light commercial hydronic heating systems
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High Efficiency Design: Engineered for steady, efficient heat delivery and fuel savings
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Natural Gas Fuel: Consistent combustion performance with easy utility gas hookup
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Trusted Brand: Weil-McLain reputation for robust, dependable boilers
Q&A
Q: What fuel does this boiler use?
A: Natural Gas
Q: What is the heating capacity?
A: 119,000 BTU
Q: Where is this boiler best used?
A: Residential homes or light commercial heating systems with hydronic distribution
Q: What makes cast iron beneficial?
A: Excellent durability, corrosion resistance, and heat retention for long-lasting performance
Maintenance Tips
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Annual Service: Have a licensed technician inspect burner, controls, and combustion
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Check Water Levels: Ensure proper boiler water level and pressure regularly
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Flush System: Periodically flush to remove sediment and maintain efficiency
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Inspect Vents & Flues: Confirm venting pathways are clear and stable
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Watch for Leaks: Regularly check connections and heat exchanger for signs of moisture or wear






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