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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 ...
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%.
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.
The efficiency of a heating system is typically measured by its AFUE (Annual Fuel Utilization Efficiency) rating. Higher AFUE ratings indicate a more efficient furnace. [ 5 ] Environmental impacts are a concern with heating systems, especially those that burn fossil fuels.
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 ...
The burner in the vertical, cylindrical furnace as above, is located in the floor and fires upward. Some furnaces have side fired burners, such as in train locomotives. The burner tile is made of high temperature refractory and is where the flame is contained. Air registers located below the burner and at the outlet of the air blower are ...
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