Welcome to the audio version of the following web page: https://thehvacjournal.com/how-to-choose-the-correct-nominal-size-vs-the-actual-size-air-filter-sizing/ In this episode, we clear up the confusion between nominal and actual air filter sizes. Learn how to measure correctly, avoid common sizing mistakes, and choose the right filter to keep your HVAC system efficient and your indoor air clean. When learning how to choose the correct nominal vs. actual air filter size with TheHVACJournal.com, be sure to pair that knowledge with high-quality options. Shop trusted filters at merv13.net, Amazon, Walmart, or eBay to keep your system efficient and your air clean.