42 C.F.R. § 84.147 Type B supplied-air respirator; minimum requirements.
Title 42 - Public Health
No Type B supplied-air respirator shall be approved for use with a blower or with connection to an air supply device at positive pressures.
Title 42: Public Health
PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES
Subpart J—Supplied-Air Respirators
§ 84.147 Type B supplied-air respirator; minimum requirements.
