Upgrading our Filter Grille & ERV Pre-Filter w/ MERV 13 4" Media

To make our home a little simpler, filter-wise (15 filters when first built, which was too many), we've modified our central return and installed a few HVACQuick CFB-10 inline boxes (https://hvacquick.com/products/reside.... These 24"x24"x4" filters I'm currently sourcing from: https://www.discountfilters.com/24x24... To learn everything I know on this topic, take my Ventilation Design and Installation course: https://buildingperformanceworkshop.c... Join the world's best year-round conference on building science for as little as $5:   / homediagnosistv   Get 1-on-1 help with any home or training for pros: https://buildingperformanceworkshop.com/