153.351—Location of 4m vent discharges.
Except as prescribed in § 153.353, a 4m venting system must discharge:
(b)
At least 10m (approx. 32.8 ft) from air intakes for, or openings into, accommodation or service spaces.
[CGD 78-128, 47 FR 21208, May 17, 1982]