GCA Gas Boiler, Atmospheric Gas Boiler (Water)
Key Features:
Control module and ignition control with mistake-proof wiring and diagnostic indicator lights
Compact design saves valuable living space
Stainless steel burners for quieter ignition, longer life, and improved combustion
Gas fired water boiler with cast iron sections
Easily accessible controls, vertical flue ways and top cleaning for easy and quick servicing
83% AFUE

CGi Gas Boiler, High Efficiency Gas, Induced Draft Boiler (Water)
Key Features:
Gas fired water boiler with cast iron sections
Direct vent capability
Can be used with natural or propane gas
All units are factory-tested, and include a limited lifetime warranty on cast iron sections
Compact design saves valuable living space
No vertical draft hood and no mechanical vent damper
Intermittent electronic ignition with standard components for easy servicing
84% AFUE

CGs Gas Boiler, High Efficiency Gas, Direct Vent Boiler (Water)
Key Features:
Uses sealed combustion technology which reduces energy usage by eliminating air infiltration
Compact design saves valuable living space
Control module and ignition control with mistake-proof wiring and diagnostic indicator lights
Uses stainless steel burners for quieter ignition, longer life, and improved combustion.
Easily accessible controls, vertical flue ways and top cleaning for easy and quick servicing
Gas fired water boiler with cast iron sections
85% AFUE

GV Gas Boiler, High Efficiency Gas, Power Vented Boiler (Water)
Key Features:
Gas-fired direct vent water boiler with cast iron sections
Uses sealed combustion technology which reduces energy usage by eliminating air infiltration
Control module and ignition control with mistake-proof wiring and diagnostic indicator lights
On-board pictorial wiring diagrams and troubleshooting guide
Fast power hookup with external J-box and pre-stripped wires
Low NOx Certified by South Coast Air Quality Management District (Rule 1146.2) in California
Easily accessible components, and fewer parts for quick and easy servicing
Energy Star Rating
Simple propane conversion
87% AFUE

Ultra Series 3 Gas Boiler
Ultra Series 3 delivers peace of mind, unmatched comfort and immediate payback in energy savings.
Key Features:
Gas fired water boiler with cast aluminum heat exchanger
Ventura mixing body mixes air and gas providing higher efficiency
Designed to operate in low temperature condensing applications
Outdoor reset and domestic hot water priority standard
Negative regulated gas valve precisely delivers gas to the boiler
U-Control gives you the power for easy set-up and maintenance
Modulates with 5 to 1 turn-down ratio
Variable speed motor matches combustion output to heating needs
High grade stainless steel burner features quiet operation, high efficiency, and cleaner combustion for low NOx applications
Ultra 310 93.3% efficient rating is a gross output and combustion efficiency.

Ultra Series 3-UE Gas Boiler
Ultra Series 3-UE delivers peace of mind, unmatched comfort and immediate payback in energy savings.
Key Features:
Gas fired water boiler with cast aluminum heat exchanger
Venturi mixing body mixes air and gas providing higher efficiency
Designed to operate in low temperature condensing applications
Outdoor reset and domestic hot water priority standard
Negative regulated gas valve precisely delivers gas to the boiler
U-Control gives you the power for easy set-up and maintenance
Modulates with 5 to 1 turn-down ratio capability
Variable speed motor matches combustion output to heating needs
High grade stainless steel burner features quiet operation, high efficiency, and cleaner combustion for low NOx applications