Cartridges and filters
For a list of the N Series cartridges and filters, see the Honeywell website. This is NOT a complete list:
A low-profile P100 filter, magenta color. The 7580P100 is made of HEPA-type glass fiber paper.
7506N95 and 7506N99
These are N95 and N99 filters made of electret filter media. They are sold either as a filter-only set or as a pre-assembled filter assembly. The N95 and N99 filters are to be used with a filter assembly: the N750027 ("Seal check/filter cover") and N750015 ("Filter Holder"). When purchased as a pre-assembled set, these are sold as the 7531N95 and the 7531N99.
The N95 and N99 filters are easier to breathe through (lower pressure drop) than the low-profile P100 filters, and the N95 filter is easier to breathe through than the N99 filter.
While the N Series N95 and N99 filters are NIOSH certified, meaning they will achieve > 95% or > 99% filtration efficiency in the NIOSH tests, independent testing data is useful to learn what the specific numbers achieved are (as NIOSH doesn't release information from their testing).
N Series N95 filters:
- In a 2013 study, "North Safety Products" 7506 N95 filters achieved between 99.6% and 95.8% filtration depending on test conditions (tested with a bacteriophage aerosol around 500 nm on average).
- In a 2003 study, 7506 N95 filters were tested in a respirator sealed to subjects' faces (to eliminate leakage) with a TSI Portacount Plus. The researchers found the 7506 N95 filters achieved at worst around 96% (Table III, "N95 fit factor", lowest 4 values for North, averaged).
N750027 (Seal check/filter cover) and N750015 (Filter holder)
Used with the N95 and N99 filters above.
- Honeywell N Series Cartridges and Filters on the Honeywell US website - includes full, current list of N Series cartridges, information on where to purchase, etc.
- List of respirators with pages on Encycla.