42 CFR § 84.163 - Man test for gases and vapors; Type C supplied-air respirators, demand and pressure-demand classes; test requirements.

---
identifier: "/us/cfr/t42/s84.163"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "42 CFR § 84.163 - Man test for gases and vapors; Type C supplied-air respirators, demand and pressure-demand classes; test requirements."
title_number: 42
title_name: "Public Health"
section_number: "84.163"
section_name: "Man test for gases and vapors; Type C supplied-air respirators, demand and pressure-demand classes; test requirements."
chapter_name: "PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "G"
subchapter_name: "OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES"
part_number: "84"
part_name: "APPROVAL OF RESPIRATORY PROTECTIVE DEVICES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "29 U.S.C. 651  30 U.S.C. 3, 5, 7, 811, 842(h), 844."
regulatory_source: "60 FR 30355, June 8, 1995, unless otherwise noted."
cfr_part: "84"
---


# 84.163 Man test for gases and vapors; Type C supplied-air respirators, demand and pressure-demand classes; test requirements.

(a) The completely assembled respirator will be worn in a chamber containing 0.1 ±0.025 percent isoamyl acetate vapor, the intake of the hose will be connected to a suitable source of respirable air, and not more than 25 percent of the hose length will be located in isoamyl acetate-free air.

(b) The test will be conducted at the minimum pressure with the maximum hose length and will be repeated at the maximum pressure with the minimum hose length.