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In an effort to reduce the greenhouse gas emissions that are causing climate change, the Department of Energy on proposed new energy-efficiency standards Monday for residential gas furnaces.
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 Energy Department issued its final efficiency rules for residential furnaces on Friday, which it projects will save Americans over $1.5 billion in heating expenses per year. The updated ...
That new rule would sideline noncondensing furnaces, which are less energy efficient, and make newer furnaces mandatory in 2028. DOE has now decided to ban a segment of instantaneous water heaters ...
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 ...
The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, peak measure of conversion efficiency, but instead attempts to represent the actual, season-long, average efficiency of that piece of equipment ...
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