ARM 37.115.511
ARM 37.115.511. VENTILATION
Cite as Mont. Admin. R. 37.115.511
(1) All bathhouses, dressing rooms, shower rooms, toilet rooms, and indoor pools, spas, and other water features must provide air turnover that is adequate to prevent the buildup of odors, excessive condensation, and chloramines.
(2) Ventilation in pools built after March 1, 2010 must meet ventilation requirements of the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) or the building code in force for that location for air turnover.