HVAC Systems
High-Efficiency Furnaces: The Hidden Dangers of Improper PVC Venting
High-efficiency furnaces are great when they’re installed correctly. Quiet, efficient, and cheaper to run — on paper. In the field? I find more venting mistakes on high-efficiency furnaces than almost any other heating system. And most homeowners have no idea anything is wrong. PVC venting looks simple. That’s the problem.
February 23, 2026
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