Industrial fans – especially centrifugal fans – create average to large volumes of air with high pressures. In order to best technically and economically dimension the pipe and duct networks, exact specifications of the operating conditions are needed: medium, amount of over- and low-pressures, temperature and tightness requirements.  The system is planned on site and factors in such things as process data, air volume, duct cross-sections and components such as filters or heat exchangers. The pipe and duct systems are designed and produced based on all of these factors.