Skylight with automatic ventilation - how does it work?

Especially with skylights, automatic ventilation often makes sense. How these vents work and what benefits they have, you can read in this post. In addition, what other solutions are there for a particularly energy-saving ventilation in skylights.

Need of airing

Regular airing is required for several reasons:

  • A regular supply of fresh air ensures sufficient oxygen in the rooms
  • A regular air change also removes moisture from the room outside before it can accumulate and cause damage
  • Pollutants released from walls, floors and furniture are discharged to the outside and can not accumulate in the room

Minimum ventilation according to DIN

According to DIN 1946-6, every room must have a constant minimum air exchange. An automatic ventilation takes on this task, without the user having to remember to ventilate himself.

Skylight with automatic ventilation - how does it work?: automatic

Anyone who lifts by hand should ventilate at least 3 to 4 times a day, for a minimum of 5 to 15 minutes. To save this work, there are automatic ventilation.

Mechanical automatic ventilation in skylights

Skylights can be factory fitted with automatic fans. These long-life fans ensure a constant air exchange according to the minimum air change rate prescribed in DIN 1946-6.

The mechanical ventilation is usually to be operated via the window handle. It can be closed completely, but normally this is not necessary. The ventilation is designed so that with the corresponding handle position an automatic continuous ventilation takes place.

In order to avoid too much heat loss at high wind loads, many roof windows have a wind load-dependent throttling. This throttling also works mechanically and automatically.

In order to prevent the ingress of water, the mechanical continuous ventilation is designed in such a way that water from outside (eg in case of rain) always flows around the fan and thus can not penetrate it. The continuous ventilation can thus be easily opened even in the rain.

This has the advantage that you can never forget or overlook to close the window in the rain, because it stays constantly.

Automatic ventilation with electric roof windows

Roof windows with electrical control usually have a built-in ventilation program. Here, the window is automatically ventilated at regular intervals and then closed again.

To prevent the ingress of water, the ventilation circuit is coupled to the rain sensor. If it triggers, the window is automatically closed within a planned ventilation period.

Ventilation with heat recovery

A very energy-efficient solution that can also be used with other types of windows, such as aluminum windows or plastic windows, is ventilation with heat recovery.

It is usually installed in the window frame or above the window frame and can also be retrofitted. Here is also an automatic continuous ventilation.

In this system, however, the heat of the exhaust air is transferred to the supply air, so that there is no heat loss through the continuous ventilation process. Such systems can transmit up to 85 percent of the room heat to the supply air, even if there are minus temperatures outside.

Video Board: Skylight ventilation demo 2013