Re: Re: Ventilation Required For Gyms ? Home › Forums › Ireland › Ventilation Required For Gyms ? › Re: Re: Ventilation Required For Gyms ? September 6, 2013 at 1:24 pm #817921 AnonymousInactive Part F of the building regs fobs you off to CIBSE Guide B. I don’t have it myself but I thiiiink that it calls up c. 6 air changes per hour for gymnasiums Is there not anything in the fire cert about ventilation? Latest News