This video breaks down a serious mistake we found during an HVAC upgrade. The original setup was a mid-efficiency furnace vented with galvanized single-wall pipe—standard for its time. But when the system was upgraded to a high-efficiency furnace, the installer reused that old venting.
Big problem. High-efficiency units produce heavy condensation, and that moisture eats through galvanized pipe fast. Rust, corrosion, and even potential carbon monoxide leaks are on the table.
✅ See what went wrong
✅ Learn why PVC or CPVC is required
✅ Find out how to do it the right way
Don’t let a shortcut turn into a disaster. Watch and learn.
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