From Non-Condensing to Condensing Vent Systems

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Challenges to Solutions

In response to consumer demand for higher efficiency boilers and updated regulations from the Department of Energy, the conversion from non-condensing to condensing vent systems becomes necessary. The benefits of higher efficiency are clear, but this transition comes with its own set of challenges. 

Venting 101 

To understand the best solution for converting to a condensing vent system, it is important to start with the basics of venting. Most are familiar with the combustion triangle. Combustion requires fuel, oxygen, and heat (ignition source) in proper proportion to occur. The purpose of gas/oil fired appliance venting is to safely remove products of combustion (POC) from the ap- pliance to the outside atmosphere. Some POC include carbon dioxide, heat, water vapor, and acids/oxides. For non-condensing boilers and furnaces, the heating tem- peratures are kept high enough to prevent water vapor in the flue gas from condensing. This is important, because if it does condense, the condensate causes corrosion due to its acidity.

Learn more about how to navigate the challenges!