Industrial air conditioning systems which are produced by Cref Systems, are the latest and complementary products added to the product range of GL Machine. These air conditioners, which are manufactured by a team specialized in many years, are designed to cool cabins, electrical rooms and switchboards of process cranes operating under heavy working conditions such as Iron and Steel Plants, Paper Mills, Shipboard Cranes and Port Cranes. CREF SYSTEMS units are manufactured in a structure resistant to high vibration, high temperature, high radiation, excessive dusty air and corrosive matters in the working environment. These cooling units are manufactured in three main groups, compact, Split and Modular (Vertical and Horizontal) type, in which they can operate at ambient temperatures from +60 °C to +90 °C. Designed and presented according to operating conditions, these devices complete quality control phase prior to delivery and are tested to EN378-2 standards.