what is the actual size of a 20x32x2 air filter before buying

20x32x2 Nominal vs Actual Size: What You Need to Know Before Buying

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An educational infographic demonstrating how an HVAC filter's smaller actual size compared to its nominal dimensions creates gaps in a return vent, resulting in unwanted bypass airflow.

Here’s something we hear all the time at HVACSync: “I ordered a 20x32x2 air filter and it doesn’t measure exactly 20 by 32 by 2 inches. Did I get the wrong one?” Nope. You got exactly the right filter. That’s just how air filter sizing works, and once you understand the difference between nominal and … Read more