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. 2021 Jun 2;26(2):66–70. doi: 10.1089/apb.20.0073

Table 1.

Initial and long-term periodic efficacy testing data of 20 Respirex filters

Date put in service	Test dates
Date put in service	February 18	May 18	July 18	October 18	June 19	July 19	November 19	January 20	June 20	August 20
February 18	Pass	Pass		Pass		Pass			Pass
February 18	Pass	Pass	Pass		Pass					Pass
February 18	Pass	Pass			Pass			Pass
February 18	Pass	Pass				Pass	Pass
July 19	Pass	Pass				Pass	Pass
July 19	Pass	Pass				Pass				Pass
July 19	Pass	Pass				Pass			Pass
July 19	Pass	Pass				Pass		Pass
July 19	Pass	Pass				Pass			Pass
July 19	Pass	Pass				Pass				Pass
July 19	Pass	Pass				Pass			Pass
July 19	Pass	Pass				Pass			Fail^a	Pass^b
July 19	Pass	Pass				Pass			Pass
July 19	Pass	Pass				Pass		Pass
July 19	Pass	Pass				Pass	Pass
July 19	Pass	Pass				Pass				Pass
July 19	Pass	Pass				Pass				Pass
July 19	Pass	Pass				Pass	Pass	Pass
July 19	Pass	Pass				Pass		Pass
June 20	Pass	Pass							Pass

^{^a}

Failed on airflow resistance only; filter integrity test result was acceptable.

^{^b}

Same filter with the new replaceable filter cartridge.