Maintain this for as long as the outside temperature remains higher than inside. Once the outside air temperature drops below the temperature inside - or, the 'tide' goes back out - open doors and windows up again to assist with draining out any 'flooding' that occurred. Reset before the next day's temperatures become higher than the temperature inside, (or the next 'incoming tide' reaches the 'hull' of your 'ship') again. Hope you've all been taking notes. There will be a test. 2/2