![](https://indianafilter.com/wp-content/uploads/2022/03/cz_0035_airfilterratings_chart_update_l1.png)
Merv 13
![](https://indianafilter.com/wp-content/uploads/2022/03/dp_green_13_pleat_filter.png)
Merv 13 pleats have boomed post-COVID. Merv 13 is the first merv rating with a significant increased efficiency at capturing the virus. There is a higher system resistance when switching to Merv 13, so consult your HVAC technician for advice on if they will work for your application.
Final Filters
![](https://indianafilter.com/wp-content/uploads/2022/03/parker_quad-seal-removebg-preview-1.png)
Final filters are typically Merv 13 or higher, with availability at lower ratings if needed.
Crystal-Aire
![](https://indianafilter.com/wp-content/uploads/2022/03/crystal-aire_unit.png)
Crystal-Aire is a new Parker product, designed and engineered for a post-COVID world. This unit can purify the air in a room using 4 internal filters and UV light. Units can be mobile, wall or ceiling mounted. Common places for these units would be break rooms, doctor office, hotel lobbies, restrooms etc.