The goal: maintain professional-grade ice and enough comfort so that spectators will stick around. In the old days, facilities would dump too much outside air into the space and then chase a good indoor environment into overtime and beyond. These days, they play hockey in the desert, and the elusive hat trick involves facing off with dewpoint and rh levels, meeting ASHRAE 62, and taking a heating assist where you can get it (hint: think desiccant, and you've got a shot).
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