Not to toot our own horn, but our air filters are pretty awesome. Why? PHILANTHRO furnace filters are engineered to deliver the same (or better) air filtration as the leading air filter brands found at home improvement and other retail stores. And because we've been in the heating and air conditioning industry for a long time, we designed all PHILANTHRO furnace filters and air conditioner filters with the highest standards in mind. But don’t just take our word for it. All PHILANTHRO air filters carry a MERV 11 rating. MERV stands for Minimum Efficiency Reporting Value. The higher the MERV, the better the filtration. So that means we offer some of the best air filters for your home. Here's the breakdown: