For twenty years now Design Engineering, has been known for producing exceptional quality heat control products primarily sold through the performance distribution system. But there's another facet of our business that we specialize in - working with other customers to help solve their heat and sound control problems. Today, DEI is bigger, stronger, and "cooler" than ever. With Dale's son David at the helm, the family is committed to continuing Dale's vision of moving DEI forward by developing and improving products to ensure they remain industry leaders.