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When you select Burnham, you’re buying more than just an appliance. Every product is crafted with the highest quality materials and components – by experts committed to delivering the absolute best performance. With Burnham products, you can count on the best craftsmanship, ingenuity, and customer service and support that the industry has to offer. CHG “Condensing, High Efficiency, Gas” Boilers Today’s lifestyles have created ever increasing demands for abundant supplies of comfortable space heating including radiant heat, domestic hot water, and snow melting to keep walks and driveways clear – all with the best possible efficiencies available. A condensing boiler can help ensure that all of these needs are met. Burnham now offers the best solution for these demanding needs with a ruggedly designed, cast aluminum, condensing boiler that has efficiency ratings exceeding 94+%. The CHG boiler will meet your family’s heating needs and save you money in energy operating costs. 94+% Efficiency What is a “condensing” boiler? Burnham CHG condensing boilers achieve 94+% efficiency through our uniquely designed heat engines. These sectional, cast aluminum designs use the heat in the exhaust gases from the boiler’s combustion process to preheat the water as it enters the boiler, thus capturing energy that otherwise would be lost. When a condensing boiler is working at its peak efficiency, the water vapor produced in the gas combustion process condenses back into water – hence the name “condensing” boiler. This condensation of exhaust gases releases the latent heat that is given off when water is vaporized. Together these two processes, condensation and vaporization, create the high efficiencies associated with Burnham’s CHG condensing boilers. The “Quiet” Boiler Full Modulating Operation Our CHG boilers are designed to automatically adjust the firing rate to match your home’s heating needs. With up to a 5-to-1 turn down ratio, a CHG boiler will continuously adjust its output to more efficiently and effectively provide the right amount of heat which further helps conserve fuel and reduce heating costs. Through its state-of-the-art design, packaging, and unique combustion process, a CHG boiler operates so quietly that you may not even “hear” it firing, but you can see its operating sequence with a digital display mounted on the top of the boiler. 15-Year Limited Warranty Potential Annual Fuel Savings by Increasing Efficiency Example Savings for: 150,000 Btu Boiler Gas price at $12.00/Mcf NOTE - When determining potential savings, all of these factors must be considered: (1) increased efficiency rating over previous equipment , (2) new boiler BTU rating, (3) cost of fuel, and (4) hours per day of full operation. The aluminum heat engine in our CHG boilers is covered by a 15-year limited factory warranty. The purchase of an optional Burnham’s Winter Warmth Assurance program for your CHG boiler can extend our True Blue Warranty protection to include parts and labor for the entire boiler for either 5 or 10 years. Safety with Increased Efficiency CHG boilers use a sealed combustion system that isolates the combustion process in the boiler from the air inside your home. This design helps save energy dollars by using outside air, rather than room air you’ve already paid to heat, and assures that exhaust gases go directly outside. In addition, the CHG boilers are designed to keep your heating system running efficiently with Annual Fuel Utilization Efficiencies (AFUE) of 94+% which can save you hundreds of dollars on your annual heating bill. CHG Site Glass & Burner The flame can be continuously modulated from an orange glow to a full blue flame. The burner is located on the top of the heat engine forcing the heat down while the water flows upward. This allows the condensation to drain down and away from the boiler. Cutaway view showing actual water flow path. Boiler Operations The CHG castings incorporate a multi-pass water flow with the return water entering the lower manifold and progressing upward to the supply manifold. This counterflow from bottom to top provides for maximum heat transfer while the serpentine pattern offers low pressure drop. Each section’s water flow is independent with no port connections between sections. The supply and return manifolds are designed to balance the flow across all sections. Supply Manifold Return Manifold Negative regulated gas valve with factory set outlet pressure. Premix Technology CHG boilers utilize a pre-mix combustion assembly that includes a modulating gas valve, variable speed blower and a venturi to provide an optimal fuel/air mixture to a stainless steel mesh burner. Together these components accurately and efficiently help control the fully modulating combustion process which automatically adjusts the boiler’s firing rate to match your heating needs. Venturi Variable Speed Blower Boiler Control Module & Outdoor Reset The MCBA microprocessor control manages all boiler function...