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Dual And Single Electric Fans

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Airflow is the key measurement for determining the cooling capability of electric fans. Fans that pull between 2,500 and 3,300 cfm will keep most engines cool unless you are towing, and then you’ll want 4,500 to 6,000 cfm. The common and inexpensive basket fan (left) moves 2,250 cfm and is good as an auxiliary fan, while Flex-a-lite part number 294 (right) moves 6,000 cfm and is fully shrouded to fit many full-size truck radiators.