Filtration Testing Service
Contact information and description for 4C Air's testing service (masks, filters). We will email you after receiving your request to discuss details of your testing needs.
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4C Air, Inc. Testing Report
4C Air is capable of testing the filtration efficiency and pressure drop of samples, consistent with the filtration efficiency test used for NIOSH N95 (STP-0059). Tests will be conducted with a TSI 8130A "Automated Filter Tester", using NaCl as the aerosol (0.26 um mass mean diameter, 0.075 um count median diameter). For respirator samples, 4C Air can perform a loading test to determine the minimum efficiency, if necessary. Respirator samples will be tested using 85 L/min flow rate.

Masks after the test will not be returned to the sender, unless there are specific needs. The filtration test will require removal of the elastic straps to ensure proper sealing of the mask on the filter tester.

4C Air does not have the capability to test the fitting of samples. For samples that are filtration media and not in a mask form, it is preferred if the sample size can exceed 5×5 inches (~13×13 cm).
Please describe your test requirements *
NIOSH pre-certification test, quality control tests, filtration media tests, etc.
We will review your request and email you back ASAP.
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