StacksVerified U.S. regulatory reference

42 CFR §84.122

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Resistance to airflow will be measured in the facepiece or mouthpiece of a gas mask mounted on a breathing machine both before and after each test conducted in accordance with §§ 84.124, 84.125, and 84.126, with air flowing at a continuous rate of 85 liters per minute.
  2. (b)The maximum allowable resistance requirements for gas masks are as follows: