This range of Honeywell filters suit the legacy North half face and full face masks, including the 5500 & 7700 series half masks and the 7600 series full face mask.

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The general rule for filter replacement is to leave the contaminated area and dispose of the filter if it becomes damaged, soiled, or breathing becomes difficult. Even if none of these things happen, it's recommended to dispose of filters after 40 hours of use or 30 days, whichever comes first.

People often ask how long a respirator cartridge lasts. The answer is significantly less if they are not properly cared for. I'll admit in the past I have not been kind to my respirator cartridges. I haven't treated them well. I've finished my work and shoved them in the shed with the other painting supplies, or worse left them on the work bench in an the area I just finished painting. As a result, they haven't lasted very long. It's a waste of money, it adds plastic trash to the landfill, and it's just plain irresponsible. I'm sorry.