Description
Weil-McLain CGa-5 Series 3 133,000 BTU Cast Iron Natural 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
- Natural draft, silent operation
- Integrated Boiler Control Module with intermittent electronic ignition system and indicator/diagnostic lights
- Compact design saves valuable living space
- Built-in low water cut off functionality
- Stainless steel burners for quieter ignition, longer life, and improved combustion
- Gas fired water boiler with cast iron sections
- Easily accessible controls, vertical flueways, and top cleaning for easy and quick servicing
What Our Experts Think
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Dependable heat output: The Weil‑McLain CGa‑5 Series 3 133,000 BTU Cast Iron Natural Gas Boiler offers steady, reliable hydronic heat — well‑suited for mid‑ to large‑sized homes, duplexes, or light commercial spaces.
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Cast‑iron durability: Classic cast‑iron construction provides excellent thermal mass and corrosion resistance, helping the boiler deliver long service life with smooth, even heat distribution.
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Straightforward design: Conventional boiler architecture with proven components makes service and maintenance accessible for techs.
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Trusted performance: Weil‑McLain’s CGa series has a longstanding reputation for robust operation and dependable start‑ups in a wide range of heating systems.
Product Q&A
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What type of boiler is this?
A cast‑iron, natural gas‑fired hydronic boiler that heats water for baseboards, radiators, or radiant floor systems. -
What is the heating capacity?
Provides 133,000 BTU/hour — ideal for medium to larger residential or light commercial applications with moderate heating loads. -
Does it need special venting?
Yes — conventional natural gas boilers require proper chimney or venting per local codes and Weil‑McLain guidelines. -
Can this be used in new construction?
Yes — especially where traditional cast‑iron boiler performance is preferred over condensing units.
Maintenance Tips
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Annual professional service: Have a licensed HVAC technician inspect the boiler before each heating season — check the burner, heat exchanger, combustion performance, and controls.
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Monitor pressure & water level: Keep system pressure within recommended ranges and check the expansion tank regularly.
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Bleed air from circuits: Release trapped air in baseboards or radiators to maintain efficient heat distribution.
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Inspect venting and combustion air: Clear any blockages and ensure flues and intakes are properly sealed and unobstructed.
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Watch for leaks: Periodically check around fittings, valves, and piping for signs of water or gas leakage.
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Flush system periodically: Remove sediment and scale to help maintain efficiency and prolong component life
Reviews
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