The pollution problem prompted Webasto to launch a campaign to raise awareness of the idling issue.
CNN: An eco-friendly way to cool big trucks
The tour coincided with spiking fuel prices and appears to have succeeded -- Webasto sold 500 BlueCool units in July, its best month ever.
The fan and circulation pump use only 3.5 to 10 amps from the truck's battery -- which means there's no danger of draining the battery, Webasto says.
To decrease that percentage and increase awareness of BlueCool, Webasto hired a trucker named Buck Threehouse to take a BlueCool-equipped truck on a summer publicity tour of truck stops across the country.
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