VENTILATING APPARATUS IN BUILDING HAVING NATATORIUM

PURPOSE:To prevent the corrosion of hardware in the attic over a natatorium by forcing into the attic the air discharged from an ordinary room adjoining the natatorium so as to constantly maintain the internal pressure in the attic at a positive pressure over the internal pressure in the natatorium. CONSTITUTION:A ventilating apparatus 7 is installed in the attic 8 over an ordinary room 5 and the attic 4 over a natatorium 2 communicates by a duct 10 with the ordinary room 5, whose ceiling 6 has a ventilating hole 9 therefor. By a ventilating fan 11 the air discharged from the ordinary room 5 is forced into the attic 4 over the natatorium 2 so as to maintain the internal pressure in the attic 4 over the natatorium 2 at a positive pressure over the internal pressure in the natatorium 2 and the air thus brought from the ordinary room 5 is discharged into the outdoors through a louver-window 12. As a result, the corrosion of the hardware in the attic over the natatorium which is due to entry of the moisture and disinfectant chlorine gas rising from the natatorium below can be prevented so that both the initial cost and running cost of the building can be reduced considerably.