Question

if ventilators are closed in hot summer

Answer 1

Then their will be no fresh air to breath it means all the air in space converts oxygen into carbon dioxide and u r suffering for taking breath

Answer 2

if THERE ARE NO VENTILATORS IN SUMMER, THERE WILL BE NO FRESH AIR TO BREATHE,WE CANT BREATHE PURE OXYGEN,U CAN SUFFER FROM BREATHING IMPURE OXYGEN.