I purchased and got the filters about a week ago. Oregon is now having guess all over the state. The air quality is terrible. Currently the worst in the world. In Thursday I came home and took out my 3M filter and put in the MERV 13 filter and turned in the fan of my furnace and my oh my, the smell of smoke left out house and made it quit comfortable. I have it run for about 30 minutes every couple of hours and the quality of air improves quite a bit. I have told 4 other people about Fukterbuy. Oh I was also happy about the fit. 3M and Honeywell I always have to bend the filter to get it into the slot. With Filterbuy it the first time