WHAT IS THE CNP METHOD FOR MASK FIT-TESTING?
OHD created a device that uses air as the test agent, the Quantifit. Our patented Controlled Negative Pressure (CNP) technology generates a challenge pressure that is equivalent to the harshest of environments. To get a better understanding of our OSHA, NFPA and ISO-approved method of fit-testing, check out the video above!
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