Review on 🍃 Honeywell FC100A 1003 16X20X4: Genuine Replacement Filter for Optimal Air Quality by Bret Wong

I have made the mistake of buying air filters that are advertised as specific sizes but are actually 1/2" or 5/8" smaller in all directions. The filter then falls straight down through the filter rack and the recirculation duct. It's exactly what you need - a precise fit, high-quality filter media, and a cardboard frame strong enough not to fold during installation. The product is much better than others.