Engel Europa International Ltd are specialist suppliers of coil line, roll former and duct forming machinery to the HVAC industry (heating, ventilating, and air conditioning).Our Autofold 516 coil line is one of the most popular HVAC ducting coil lines in production and is sold in 54 countries worldwide.The very first Autofold was delivered in 1984, and was the original ducting coil line to be designed and manufactured in the United Kingdom. Since then, over six hundred machines have been produced and shipped worldwide.