Rooms or enclosures containing storage batteries shall be ventilated so as to remove acid spray and prevent dangerous accumulation of inflammable gas. Communication of drafts to other rooms shall be prevented.
34 Pa. Code § 39.123
This section cited in 34 Pa. Code § 39.85 (relating to general requirements); 34 Pa. Code § 39.121 (relating to applicability); and 34 Pa. Code § 39.201 (relating to storage batteries, transformers, and lightning arresters).