Review on MERV 13 Optimal Defense Pleated Air Filter Replacement - 14X20X4, Ideal For HVAC AC Furnace (1-Pack), Actual Size 13.50 X 19.50 X 3.63 Inches By Filterbuy by Nonito Shin

I was skeptical at first about the MERV 13 Optimal Defense Pleated Air Filter Replacement, but I must say, it did not disappoint. Our apartment has some serious dust issues, but this filter has saved the day (or rather, saved our lungs from the dust). The only downside is that it's a bit pricier than some other filters, but it's worth the investment. Overall, I'm very satisfied with this purchase and would definitely recommend it to anyone looking for a high-quality air filter.