Hunter Rotors and the Right Turf Make One Cool Ballpark in One Hot Place As if building a new baseball stadium in the middle of the desert isn’t enough of a challenge, try doing this with a giant retractable roof and a massive air conditioning system. In today's world of new sports stadiums springing up all around the country, Bank One Ballpark in Phoenix is unique. Its playing field is exposed to the sun (and what a hot, strong sun it is) and the natural air some of the time, but is actually indoors and air conditioned most of the time. Unlike other new retractable roof facilities in such places as Seattle, Houston and Milwaukee, the ballpark affectionately known as "the BOB" has to deal with the extreme climatic conditions of Arizona's Valley of the Sun – heat and low humidity. It’s a ch

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