As the hot gases pass through the second exchanger, they cool below the dew point, causing the water vapor to condense into liquid. Consequently, the exhaust that is vented outside is much cooler than that of a conventional furnace, often appearing as a white vapor.
Condensing Vs Non Condensing Furnace: How Condensation Drives Efficiency
The Condensation Process The transition to a secondary heat exchanger necessitates a change in the physical state of the exhaust byproduct. Unlike older models that allowed heated air to escape up the flue, these modern systems capture and reuse heat that would otherwise be lost.
This phase change is the key to their superior efficiency, as it releases substantial heat that is transferred into the living space. Primary and Secondary Heat Exchangers The most critical distinction between standard and high efficiency units lies in the heat exchange process.
Condensing Vs Non Condensing Furnace: How Condensation Boosts Efficiency
By cooling the exhaust significantly, these systems condense water vapor that would normally be wasted, reclaiming the latent heat contained within the moisture. Sealed combustion is a standard feature, where the unit draws oxygen directly from the outdoors rather than from the indoor air you are heating.
More About How do high efficiency furnaces work
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More perspective on How do high efficiency furnaces work can make the topic easier to follow by connecting earlier points with a few simple takeaways.
