Code of Federal Regulations · Section

§ 84.77 — Inhalation And Exhalation Valves; Minimum Requirements

42 C.F.R. § 84.77

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(a) Inhalation and exhalation valves shall be provided where necessary and protected against damage and distortion.

(b) Exhalation valves shall be—

(1) Protected against external influence; and

(2) Designed and constructed to prevent inward leakage of contaminated air.

42 C.F.R. § 84.76 42 C.F.R. § 84.78

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