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What is a p snrf in cars?

A P-SNRF is a passive solar noise-reducing fan. It is a device that uses the sun's heat to generate electricity, which is then used to power a fan that circulates air inside a vehicle. The fan helps to reduce noise levels inside the vehicle by blocking out outside noise and reducing the amount of air that is circulated through the vehicle's vents. P-SNRFs are often used in cars, trucks, and other vehicles that are used for long periods of time.