NPPTL Respirator Assessments to Support the COVID-19 Response

Updated March 8, 2021

Non-NIOSH Approved Innovative Filtering Facepiece Respirator Assessment Results

NPPTL has completed testing the filter efficiency and resistance of non-NIOSH approved Innovative filtering facepiece respirator designs.  The results for the products are listed below.

International Assessment Results
Organization Respirator Model Innovation Filtration Efficiency Test Report
Maxi. % Min. %
Narwall Mask LLC Filter disks tested from Narwall Mask size S/M and Narwall Mask size L/XL Overhead Snorkle with custom filter media 85.2 82.8 Report 1pdf icon
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Silverline Health N/A N/A 99.494 98.990 Report 2pdf icon
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Tall Dog Electronics RSCFM1 N/A 96.55 93.20 Report 3pdf icon
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Note – The test method utilized in this assessment is not the NIOSH standard test procedure that is used for certification of respirators. Respirators assessed to this modified test plan do not meet the requirements of STP-0059, and therefore cannot be considered equivalent to N95 respirators that were tested to STP-0059.

Page last reviewed: March 8, 2021