"For manufacturers, cleaner-burning engines have reduced NOx and particulates, but they run hotter and use more fuel," says Marc Leupi, product manager, utility equipment, Wacker Neuson Corp. "Then the challenge becomes how to quiet the unit but keep enough cooling air, because now we have to cool a hotter running engine in the same tight enclosure. The effect is it increases the manufacturing cost. There's a lot more complexity to the equipment, but it's the same product."
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