09/23/2026
Three HVAC myths worth clearing up, starting with the most surprising one. Duct tape does not work on ductwork, despite the name. It loses its grip over time and lets air leak right back out. HVAC rated foil tape is the actual fix.
Next, AC systems don't automatically last 20 plus years. A well maintained one usually gets around 15, sometimes 20, but condition matters more than age when deciding whether to replace it.
Last one, filters aren't reversible. Look for the arrow and point it toward the air handler or furnace. Backward, and the filter isn't doing its job.
When in doubt, follow the arrow.
Zip Mechanical straightens out myths like these all the time.