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Universal HEPA "Permanent" Replacement Filter HRF-11 can be stacked to replace discontinued HEPA Filters 20500, 20590.
Refer to the table below to determine how many HRF-11 filters you'll need to stack:
| Discountinued HEPA Filter |
HRF-11 Filters Required |
| 20500 |
2 |
| 20590 |
1 |
- 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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