| Genuine Aprilaire 813 Media Air Filter |
 Aprilaire 813 Filters are designed for Air Purifiers using the competitive upgrade kit. Specs: -Merv 13 -Change your Aprilaire 813 filter every 6 months Supplemental Information: Merv Rating Chart Related Products: Aprilaire 213 Air Filter Aprilaire 413 Air Filter Price: 47.99 |