The Burnham 205EN-G0 is a model in Burnham's line of gas-fired, cast iron water boilers designed for residential hydronic heating systems.
Fuel Type: Natural Gas
Vent Type: Atmospheric (Chimney Vent)
Efficiency: 84% AFUE (Annual Fuel Utilization Efficiency)
BTU Input: 138,000 BTU/hour
BTU Output: 101,000 BTU/hour (Net IBR)
System Type: Hydronic (Hot Water)
Ignition: Electronic spark ignition
Circulator: Grundfos circulator pump
Heat Exchanger: Cast iron
Other Features:
Cast iron heat exchanger for durability and longevity
Pre-installed low water cut-off for safety
Draft hood and vent damper for safe venting
Industry-standard tapping locations for easy replacement
The Burnham 205EN-G0 is a robust and reliable boiler known for its durability due to the cast iron heat exchanger, and is often used as a direct replacement for older boilers due to its compatible design. It's a good option for homeowners looking for a dependable and efficient heating solution.
Series 2
Gas Fired, Chimney Vented,
Cast Iron Water Boiler
Legendary Reliability and Value, Improved for Even Higher Performance
For decades, the Series 2 has been the industry benchmark for cast iron gas-fired boilers. Its time proven design blends a long lasting cast iron heat exchanger with a heavy-duty steel base and high quality boiler controls to provide exceptional value for the homeowner.
Chimney vented
Standard tapping locations and intuitive electronic controls reduce installation costs
Direct replacement for thousands of existing boiler installations
Concealed, protected controls and components
Lifetime limited warranty
Control Features for Homeowner Comfort and Savings
Energy-saving “thermal purge” circulates residual heating water before burning fuel
Domestic hot water priority feature ensures uninterrupted supply of hot water for indirect water heaters
• 84% AFUE efficiency upgrade
– Meets DOE-2021 government requirements
• Legendary reliability and value, improved for even higher performance
• Standard tapping locations and intuitive electronic controls reduce installation costs
• Direct replacement for thousands of existing boiler installations
• Concealed, protected controls and components
• 8 sizes available, 38-276 MBH
• Lifetime limited warranty
Featuring Intelligent Hydronic Control
Control Highlights
• Pre-installed IDL-1200 low water cut off
• Easy-to-use three button operation and optional adjustments
• Two pump relays for an additional heating zone or indirect water heater
Control Features for Homeowner Comfort and Savings
• Energy-saving “thermal purge” circulates residual heating water before burning fuel
• Domestic hot water priority feature ensures uninterrupted supply of hot water for indirect water heaters
Standard Equipment
• Insulated powder coated steel jacket
• Draft hood, damper and harness
• Heavy gauge 1” base insulation
• Intelligent Hydronic Control – Simple self-diagnostic control system with 3-digit readout
• Step-opening redundant gas valve
• Spark ignition with continuous retry
• Stainless steel precision burners
• User-friendly wiring with 120V J-box
• LWCO (IDL-1200) pre-installed with high limit sensor in dual-purpose well
• ECM Circulator – Grundfos
• Cast iron section assembly
• Resettable blocked vent switch
• Boiler drain valve
• Cast iron supply manifold with safety relief valve tapping
