CGa™
Gas Boiler Series 3

The Weil-McLain CGa™ Series 3 is a high-efficiency, gas-fired water boiler designed for residential and light commercial applications. Available in seven sizes ranging from 38 to 233 MBH, the CGa™ Series 3 is adaptable to various installation needs, providing efficient and dependable heating solutions.
Features
Quiet Operation
Natural draft, silent operation
Compact Design
Compact design saves valuable living space
Built-In Safety
Now with built-in low water cut off functionality
Durable Burners
Stainless steel burners for quieter ignition, longer life, and improved combustion
Robust Design
Gas fired water boiler with cast iron sections
Service Friendly
Easily accessible controls, vertical flueways and top cleaning for easy and quick servicing
High Efficiency
84% AFUE
big on warmth, low on energy use
Engineered for comfort, designed for efficiency
Certified ENERGY STAR® and heat pump ready, this high-efficiency boiler delivers powerful, eco-friendly performance while keeping energy costs low.


Technical Specs
MODEL | AFUE (%) | CSA INPUT (MBH) | NET (MBH) | DOE HEATING CAP. (MBH) | VENT SIZE (IN.) |
---|---|---|---|---|---|
CGa-25 | 84 | 38 | 27 | 32 | 4 |
CGa-3 | 84 | 67 | 48 | 56 | 4 |
CGa-4 | 84 | 100 | 73 | 85 | 5 |
CGa-5 | 84 | 133 | 98 | 113 | 6 |
CGa-6 | 84 | 166 | 122 | 141 | 6 |
CGa-7 | 84 | 200 | 147 | 170 | 7 |
CGa-8 | 84 | 233 | 172 | 198 | 7 |
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