Through a balanced ventilation system, you control both the amount of supply air and exhaust air, unlike a central exhaust system where you only control the exhaust air. The ventilation unit consists of a fan that extracts used air from wet rooms, kitchens and technical rooms. It also consists of a fan that draws air from outside and supplies fresh, temperate air to living rooms, such as bedrooms, living rooms and offices. The supply air passes through pollen filters in the unit before being discharged into living rooms. In the ventilation unit, the heat from the used air is recovered and transferred to the supply air. This means that the air that is returned to the living rooms is heated.

A major advantage of balanced ventilation is that it recovers heat, which results in reduced energy costs. Another advantage is that the supply air is tempered, so there are no cold drafts, which contributes to a better indoor climate. Furthermore, the air supplied to the home is always clean, as it passes through a pollen filter in the unit. With such a ventilation system, the heat is also evenly distributed in the home.

There are no direct disadvantages to such a system, other than the cost of installation. Furthermore, the filter must be changed regularly.

It may be possible to use the duct system from a central exhaust if you want to install a balanced ventilation system. The prerequisite is that the ducts are not too old or in too poor condition, and that they are not too small in diameter. It is important to check the ducts before installation, and if necessary clean and repair them. It is also important to insulate all ducts in cold zones, such as the attic, due to heat recovery and the risk of condensation.

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