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Change the air filter every month during the summer, and be sure the outdoor unit is clear of weeds, shrubs and any other overgrowth or obstruction. What if you're determined to cut out cooling costs or you don't have air conditioning at all? On the next page, we'll look at some ways to stay cool without A/C. Aside from the fact that their summers may have been a little cooler, our grandparents also knew some tricks for keeping cool that we seem to have forgotten. It might seem counterintuitive to close the windows on a sweltering summer day, but if