FAQ

Ventilators

Heat recovery units - general questions Heat pumps - general questions Self-help installation of the heat recovery unit Noise

Fans

Installation recommendations for small fans Starting and running the fans Current and thermal protection of fans Motors used in fans Fans in the piping system Serial operation of fans Parallel fan operation Leakage by roof fans Lifetime of fan bearings Fire fans and choice of 400 V or 230/400 V motors Fluorescent lamps together with fan, surge faults Water condensation in fans and equipment High temperature fans (120 °C, 150 °C) PER butterfly valves and axial fans Fan noise and NV No. 502/2000 Coll. (NV No. 148/2006 Coll.)

Engines

Differences between fan type plate and motor type plate Performance of IE2 standardised motors Failures and claims of electric motors

Regulation

Choosing a control system - Digireg Speed control and regulators Using frequency converters with fans

Other

Conformity assessment according to Act No.22/1997 Coll. Hoses with sound insulation and the risk of condensation