Product Features: Sealed Combustion Reduces energy usage by eliminating air infiltration. Compact Design Saves valuable living space.  Boiler is only 28 inches high, 23 inches deep.  Power venting eliminates the need for a draft hood. High-Grade Stainless Steel Burners European-designed, high-grade stainless steel burners for quiet ignition, longer life, and improved combustion. Wiring Harness Plug-in connectors that attach only one way to assure mistake-proof wiring for installation and component replacement.

Weil-McLain Designed Control Module and Ignition Control
Designed for Weil-McLain...mistake proof wiring...diagnostic indicator lights.

Cast Iron Sections with Elastomer Sealing Rings
Boiler sections are made of durable cast iron for strength, efficiency and long life.  Modern elastomer sealing rings in the port openings assure a permanent watertight seal.

Easy Power Hook-Up
J-box located on outside of boiler with pre-stripped wires.

Convenient Servicing
Accessible controls...control module with diagnostic indicator lights...simplified wiring...vertical flueways...top cleaning.

Factory-Tested
Every boiler is tested at the factory to assure reliable operation.

Improved Parts Kits
Parts furnished in convenient kits.

Limited Lifetime Warranty
Covers cast iron sections.

Multiple Boiler Systems
Use two or more high-efficiency CGs boilers in place of one large-capacity boiler to meet the space-heating requirements of larger buildings. 

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Mclain GV3

Product Features: Unique Section Design Burner and crown sheet are at the top of the section for higher efficiency and reduced sediment problems. Low NOx Emission Technology Certified by South Coast Air Quality Management District (Rule 1146.2) in California. Direct Vent Through wall, roof or unused chimney.

Sealed Combustion
Reduces energy usage by eliminating air infiltration.

GCM Gold Control Module^®
Designed for Weil-McLain, it features mistake-proof wiring and diagnostic indicator lights.

Easy Stand-Up Service
Components are easy to get to by removing the top jacket panel.

Easy to Understand
Pictorial wiring diagrams and troubleshooting guide are right in the top jacket panel.

Fewer Parts
Faster, easier service... more reliable operation.

Unique Combustion Technology
Assures higher efficiency with fewer parts and less complexity. Achieved through premix technology - gas and air are thoroughly mixed in the blower before entering the single burner.

Simple Propane Conversion
Just change the orifice plate provided with the boiler - simple to do.

Easy to Handle
New crate design with the weight at the bottom for easy hand trucking.

Factory-Tested
Every boiler is tested at the factory to assure dependable operation.

Hot Surface Ignition
Provides more reliable starts without adjustments.

New Parts Approach
Parts furnished in convenient kits with everything needed.

Limited Lifetime Warranty
Covers cast iron sections.

Multiple Boiler Systems
Use two or more high-efficiency GV boilers in place of one large - capacity boiler to meet the space-heating requirements of larger buildings.

Easy Power Hookup
J-Box is located on the outside of the boiler and has pre-stripped wires.