This text is machine translated.
Wall and ceiling fans always provide fresh air
Wall and ceiling fans are used wherever ventilation via a window is not possible or not sufficient. This can be the case, for example, in changing rooms, shower rooms in the basement or indoor rooms without windows. In our guide you will find out which types of wall and ceiling fans are available and what to pay attention to when buying them.
-
Areas of application of wall fans and ceiling fans
-
How do axial fans differ from radial fans?
-
What do ich need to pay attention to when buying wall fans and ceiling fans?
-
Our practical tip: Use wall fan with built-in humidity sensor
-
Frequently asked questions about wall fans and ceiling fans
Areas of application of wall fans and ceiling fans
Fans are a type of fan that sucks away moist or used air through a breakthrough in the wall. They are often found in bathrooms that do not have windows. Reason: Without a ventilation system, the moist air would quickly lead to mold and bad odors. Even in the kitchen, in the laundry room or in cellar rooms fans perform their service reliably.
They are usually activated when the light is switched on and continue to run for a while after the lamp has been switched off. A fan's enclosure does not necessarily have to be made of white plastic, as was customary in previous times.
In the trade you will find a wide range of wall fans in different designs and from different materials, for example stainless steel.
Fans for walls and ceilings are not only used in private areas. Even in office buildings, the fans vent large kitchens, storage rooms or sanitary installations. If the building is located on a busy road, an adequate air exchange is possible even with the window closed. Noise and pollutants remain outside.
A single, conventional wall fan is usually not sufficient for ventilation of larger rooms. In such a case, a piping system will be installed under the ceiling. One or more pipe fans are connected to the piping and discharge the exhaust air.
Another option is a central pipe fan that is mounted on the outside wall. Here, the exhaust air is also extracted via a pipe system. The advantage of this variant is that there is much less noise in the room to be ventilated, since the fan is located on the outside of the wall and not in the room.
How do axial fans differ from radial fans?
Axial fan
Wall and ceiling fans are available in a variety of designs, including axial and radial fans.
In the case of an axial fan, the blades are located on an axis which is rotated by a motor. The air flow runs parallel to the motor axis, i.e. axial. The advantages of axial fans are the low costs and the manageable space requirements.
Radial Extractor Fans
In the case of a radial fan, the blades are mounted in the form of a drum. The air is drawn in parallel to the drive axle and redirected by 90 degrees.
Radial fans are available in particularly compact versions and produce a significantly higher pressure than axial fans. This makes them particularly suitable for industrial applications. The fans are also used, for example, in fume hoods in the domestic kitchen.
What do ich need to pay attention to when buying wall fans and ceiling fans?
When purchasing wall and ceiling fans, air throughput is one of the most important criteria. If the flow rate is set too low, adequate ventilation is not possible. In addition, the diameter of the fan and the required nominal voltage are important.
For pipe fans, the diameter of the pipe system must also be taken into account. Also note that not every pipe fan can be installed at every point of the pipe run. Depending on the ambient conditions, a splash-proof model with an appropriate IP certification may be required. When using the product under extreme conditions, the maximum conveying medium temperature must be observed.
Not every fan can be installed in every position. Before purchasing, make sure that the model you require can be operated in the required installation position.
The lifetime of the fan should also not be ignored. Typically, higher-quality models with a robust ball bearing can handle more hours of operation than a particularly low-cost fan.
With a small bath fan, the question of the generated air pressure certainly does not come up, but in the professional sector this can quickly become an important point. In principle, radial fans allow a higher air pressure than axial fans.
Our practical tip: Use wall fan with built-in humidity sensor
Wall fans with integrated humidity sensor are very practical. Whenever a specified threshold value is reached, such fans activate themselvesuntil the value falls back into the tolerable range. This is particularly beneficial for rooms that are not used frequently and where there is a certain amount of basic moisture, for example in the basement.
Frequently asked questions about wall fans and ceiling fans
At which position should a pipe fan be best mounted?
Ideally, a pipe fan should be installed as far up as possible under the ceiling. There, the warm air usually collects. For showers or other equipment where steam is produced, the fan should preferably be located directly above the source.
What was to be observed when installing a bath fan?
A bath fan is usually an axial fan, which can produce only a low air pressure. The length of the pipes in the bathroom must therefore not exceed 3 meters. If this value is exceeded, the moist air cannot be directed to the end of the piping. The result is condensate that collects inside the pipes. This promotes the formation of mold and unpleasant odors. In case a pipe length of more than 3 meters is mandatory, we recommend the use of a radial fan, which can generate a stronger air pressure.