Return Air Grille Sizing Guide CFM Chart & Calculation
3K views · Apr 18, 2022
There are many different sizes available for a return air grille. Using the correct return air grille size is important to ensure that the HVAC system has sufficient airflow as well as low noise. So, I created several CFM charts and a guide on how to calculate return air grille size. You can take a look at the charts which are easy to find on our site, or you can calculate it manually using these instructions.