An electric fan is defined as a flow machine (or aggregate) for air transport. Among other things, it is integrated as a driving force in a ventilation and air conditioning system that stands or hangs freely in the room, or vents directly to the outside through a passage.
There is a wealth of models for the different areas of application, eg column fans, ceiling fans, or tube, and window fans. The energy costs of fans should be as low as possible for the required range of action, and the pressure achieved should be as stable and high as necessary.
Whether a ventilation unit generates a medium or high volume flow depends on the air pressure that has been built up. The way the engine, blades, and impeller are designed has a major impact on air movement.
Two main types are currently manufactured: axial and centrifugal fans. In this guide, we explain the application with the respective advantages and disadvantages.
Axial fans generate less pressure than centrifugal fans but are usually sufficient and easier to install in the home.
We recommend using Axial fans in :
- Small to medium-sized individual rooms
- Normal air ratio (private households) without any particular pollution
- Direct suction and blowing out of the air (without having to go through long duct systems)
- For adequate ventilation of interior damp rooms
- As a ceiling fan in hotels, offices, and restaurants
The decision to use a centrifugal fan for :
- Connection to ventilation systems
- For extractor hoods
- In canteen kitchens with high vapor and odor development
- In the case of heavy grease, oil, and air containing chemicals
- In places with potentially explosive fumes
- Pre- and post-assembled filter boxes and all heat accumulators
- For drying (unfinished) houses on construction sites and large wet-cleaned carpets
- In buildings with damp masonry and mold infestation