An overview of the most important accessories for ventilation systems - Part 2
In this second part of our magazine series, we will introduce you to other important accessories for your ventilation system.
Wind protection - prevention of strong wind pressure
If strong wind acts on the outside wall opening of a decentralized ventilation system, this can have a negative effect on operation - for example, if the fan is driven uncontrollably or disturbing noises are generated in the ventilation pipe. Therefore, it is recommended to take appropriate measures when installing the ventilation system.
The most widely used are special non-return dampers. These are located in front of the fan and close in the event of strong wind. This also closes the air inlet and prevents the generation of noise. However, this is not possible with decentralized units in alternating operation. For this reason, special wind pressure safety devices are used in the ventilation pipe. They regulate the wind pressure before it reaches the valve gate of the ventilation.
Ventilation pipes - choose to fit the building
Ventilation ducts are one of the basic components of ventilation systems. A distinction is made between flat, round and mixed components.
Round ducts are used mainly in the ceiling area. Depending on the individual situation, the rigid plastic tubes are hidden behind a suspended ceiling or set in concrete. A key advantage of their design is their low pressure drop compared to other types. However, if less space is available or if the ventilation ducts are to run in the floor, flat ducts are a good alternative. This allows for a lower floor construction, while at the same time, thanks to their width, sufficient air volume can be conveyed.
If flexible installation is required, e.g. on uneven surfaces, flex ducts can also be used. These bendable plastic pipes can be installed without problems even on slight inclines and curves. Their corrugated shape also allows them to be cut to the required length in just a few steps.
Another aspect in pipe selection is the material. Here you can choose between hard plastic, metal, aluminum foil or polystyrene, depending on the area of application. Regardless of the type of material, it is essential that the tubes are heat and corrosion resistant. Equally important are antistatic and antibacterial properties, as this reduces dust buildup and maintains ventilation quality for a long time.
To ensure the most accurate duct installation possible, there are also different corners and connectors. Also, different types of pipes can be connected with adapters and clamps with optimal tightness.
To further improve the indoor climate, you can use flow registers that heat or cool the incoming outdoor air as needed.
Cool incoming air in particular is perceived as unpleasant by many people. A heating coil can be used to increase the temperature of the incoming air. The whole thing works either with a heating coil or heating via warm water. Depending on the desired degree of heating, a preheater or a heater should be chosen. Preheaters can raise the temperature of the supply air by up to 5°C during the winter months. Together with heat recovery, it can be kept at a constant level. If the air is to be heated beyond this, a heater is recommended. It has considerably more power and can thus also relieve the conventional heating system.
If you want to cool down your building, opt for a cooling coil. This also works with water and can help regulate the indoor climate, especially in the summer months.
In both cases, the cost of installation is within a reasonable range. To retrofit a flow register, you need to remove a piece of the ventilation pipe behind the fan. Pipe clamps can then be used to insert the heating or cooling coil at this point. Often, the operation of the equipment is carried out with a separate power connection. If no additional heating or cooling is required, the units can simply be switched off.