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David Samson

Marlins' hopes through roof

MIAMI — After years of playing baseball between rain delays and on sticky summer nights, the Marlins started with two non-negotiable features for the design of their new ballpark: a retractable roof and air conditioning.

Keeping fans comfortable will keep them coming back, the Marlins believe.

So when fans take in a baseball game at Marlins Park this season, which opens on Wednesday, they will be sitting under an 8,000-ton marvel of architecture and engineering that will keep it a cool and dry 75 degrees inside, no matter the weather outside.

"It is so humid and hot, we're going to close it at 4 p.m. every day and keep it closed for the majority of the summer,"...