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Universal HEPA "Permanent" Replacement Filter HRF-14 can be stacked to replace discontinued HEPA Filters 21500, 22500, 23500, 24000, and 29500.
Refer to the table below to determine how many HRF-14 filters you'll need to stack:
| Discountinued HEPA Filter |
HRF-14 Filters Required |
| 21500 |
2 |
| 22500 |
2 |
| 23500 |
2 |
| 24000 |
3 |
| 29500 |
4 |
- Genuine Honeywell Enviracaire True HEPA filter
- Contains 1 HEPA Filter and 1 Foam Gasket
- Filter weave has been redesigned to be vacuumed. You can vacuum this filter twice a year for permanent use. For customers who prefer not to vacuum out trapped pollutants, recommended replacement is once every 1-3 years depending on use and environmental conditions.
- 99.97% effective at removing particles as small as 0.3 microns from the air that passes through the filter
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