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Effortless comfort, Maximum Efficiency

CGi
Gas Boiler Series 4

CGi Gas Boiler Series 4

The Weil-McLain CGi Series 4 is a high-efficiency, gas-fired water boiler designed for both residential and light commercial applications. Featuring durable cast iron sections and an insulated steel jacket, it offers long-lasting performance and improved heat retention.


Features


DURABLE DESIGN

Gas fired water boiler with cast iron sections

Vent Options

Natural draft and direct exhaust capability

Flexibility

Can be used with natural or propane gas

Safety Built-In

Now with built-in low water cut off functionality

Compact Design

Compact design saves valuable living space

Simplified Venting

No vertical draft hood and no mechanical vent damper

Service Friendly

Intermittent electronic ignition with standard components for easy 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.

Energy Star logo with text and star design.
A logo with a blue and green gradient droplet and the text "HEAT PUMP READY."

Technical Specs


MODELAFUE (%)CSA INPUT (MBH)NET (MBH)DOE HEATING CAP. (MBH)VENT SIZE (IN.)NATURAL DRAFT VENTING (IN.)
CGi-258448354134
CGi-38458424934
CGi-48490667735
CGi-5841198810235
CGi-68415811713535
CGi-78419014016236
CGi-88422216418936


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