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High-efficiency condensing furnaces condense the water vapor (one of the by-products of gas combustion) and extract the latent heat to pre-heat the incoming furnace airflow, using a second heat exchanger. [2] This increases the efficiency (energy delivered into the building vs. heating value of gas purchased) to over 90%.
The fourth category of furnace is the high-efficiency condensing gas furnace. High efficiency condensing gas furnaces typically achieve between 90% and 98% AFUE. [3] A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as ...
Condensing boilers are water heaters typically used for heating systems that are fueled by gas or oil. When operated in the correct circumstances, a heating system can achieve high efficiency (greater than 90% on the higher heating value ) by condensing water vapour found in the exhaust gases in a heat exchanger to preheat the circulating water.
DOE estimates that this efficiency improvement, and the resulting lower gas bills, would save consumers $1.9 billion annually — or $500 over the lifetime of each new furnace.
By 2008, a report by the United States Department of Energy ranked the firm as fifth in the US in the central air conditioner and heat pump market with a 12% market share (behind UTC/Carrier with 27%, both Goodman/Amana and American Standard/Trane with 14% and Lennox with 12%), while in the residential gas furnace market as of 2008, the company ...
The DOE implemented efficiency regulations to prohibit new non-condensing gas furnaces by 2028, by requiring that non-weatherized gas furnaces achieve an annual fuel utilization efficiency of 95% ...
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