I wish there were more commercial air filters that accepted standard furnace filters. They're super inexpensive compared to the proprietary filters designed for

I wish there were more commercial air filters that accepted standard furnace filters. They're super inexpensive compared to the proprietary filters designed for specific air purifiers, have tons of surface area (allowing for good airflow), and there are plenty available with MERV 13 ratings. There's an argument to be made that MERV 13 isn't a good substitute for the higher rated carbon/HEPA filters that most dedicated air filters are designed to use, but I've read some things that make me question that assumption. Specifically, it sounds like, at least to a point, lower efficiency filters can be compensated for by increasing airflow, resulting in air passing through the filter multiple times?[1] I never got a satisfying answer to that question. [1]: https://dynomight.net/ikea-purifier/ https://dynomight.net/ikea-purifier/