Ventilation system shall be provided for all the buildings or rooms in whichwaste heat occurs which has to be removed but where temperature rangesdo not necessitate air conditioning and all other areas which requiresventilation.Main power house shall be provided with natural air intake and roof type fanventilation system with perturbation spot fans to strengthen air circulation.Outdoor air naturally enters from external window and electric-operatedrainproof shutter and runs through the holes to absorb surplus heat andhumidity in the room and finally discharged outside by the explosion proofroof type fans. Ventilation system shall be sized based on air flow ratecalculated considering the temperature difference between inlet and exhaustair not more than 1 ODC (Maximum) in summer.In addition, hydrogen emission device shall be installed on the top most