28 Pa. Code § 18.44
If gas chlorination equipment is installed at either outdoor or indoor pools, the equipment shall be housed in a separate room equipped with an exhaust fan to reduce to a minimum the possibility of gas leakage into other rooms or areas where persons gather.
The provisions of this § 18.44 adopted September 18, 1971, effective September 18, 1971, 1 Pa.B. 1921.