publishes educational content for professional development. To receive credit toward ACAC recertification, text or email your name along with the verification code embedded in each selection to the ACAC office at

Credits are granted to current ACAC.LIVE subscribers only, and can be applied only to the current two-year ACAC recertification period. If you accumulate more than the required number of credits in a single two-year period, keep your subscription current and then wait until after recertification to submit additional verification codes.

READ: CDC, NIOSH - Respirator Selection Logic (2004).

4 RCs. 

This document provides a series of questions that assists the user in his selection of the appropriate respiration protection. In addition, the document identifies the criteria necessary to determine the classes of respirators that will provide the minimum acceptable degree of protection for a chemical at a given concentration.

32 pages. This article is worth 4 recertification credits (RCs). To earn your credits, find the six-digit verification code embedded in the article and text or email the verification code to ACAC tracks your credits as part of your ACAC.LIVE subscription. Request a report of your earned credits by emailing our staff at


READ: OAR - An Office Building Occupant's Guide to Indoor Air Quality.

READ: NADCA - Position Paper on Chemical Product Applications in HVAC Systems.