Welcome to the audio version of the following web page: https://filterbuy.com/resources/air-filter-basics/air-filter-sizes/

In this episode, we break down the basics of air filter sizes — from nominal vs. actual dimensions to why choosing the right size matters for your HVAC system’s performance and air quality. Whether you're replacing your first filter or just confused by the numbers, this quick guide will help you breathe easier and shop smarter.

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