The Mall of America in Bloomington, Minnesota, is likely the most complicated place to keep cool on hot days.
The site is welcoming 100,000 visitors per day. Many are seeking the 72-degree stability it offers. WCCO got an exclusive look at the cooling system on the roof.
The building has 186 compressors. On scorching hot days like Monday, they run 80% of them. The system is large enough to cool 5,000 to 6,000 average homes…