The article is talking about temperate climates, whereas Florida is humid subtropical in the north and central parts and tropical in the south.
In temperate climates, the temperature outside might be just cold enough, but not too cold, that "opening the windows", or something equivalent, might be a viable strategy.
In temperate climates, the temperature outside might be just cold enough, but not too cold, that "opening the windows", or something equivalent, might be a viable strategy.