Welcome to the audio version of the following web page: https://thehvacjournal.com/hvac-air-filter-sizing-calculations/ In this episode of The HVAC Journal Podcast, we dive into the essential topic of HVAC air filter sizing calculations—a must-know for homeowners, DIYers, and HVAC pros alike. Learn how to accurately measure and calculate the correct filter size for your system, why "nominal" vs. "actual" dimensions matter, and how using the wrong size can impact airflow, energy efficiency, and indoor air quality. Understanding the difference between nominal and actual dimensions can prevent costly airflow issues and ensure your system operates efficiently. For further clarity, FilterBuy also offers a helpful measurement guide and even carries unique sizes like 19.88x21.5x2 filters for hard-to-fit systems. If you need a replacement right away, standard sizes are readily available, such as 24x24x1 pleated filters on Amazon, 12x24x1 MERV 8 packs from Walmart, or affordable options on eBay. For those in Celebration, FL, FilterBuy's local HVAC services can help you install or maintain a properly sized system. Planning a full upgrade? Installation quotes are available in Loxahatchee Groves, Orlando, Oviedo, Altamonte Springs, and Maitland. To enhance air quality and system efficiency further, consider pairing the right filter size with services like vent cleaning in Coral Springs, UV light installation in West Palm Beach, tune-ups in Delray Beach, or duct sealing in Pembroke Pines. For added protection, air purifier installation services or a full system upgrade via Specialized Air Conditioning Replacement can ensure long-term comfort and clean air.