ᐅ Central mechanical ventilation with heat recovery: supply and exhaust air, door undercut

Does it make a difference if you have a central controlled ventilation system with heat recovery?

We are getting the Zehnder ComfoAir 350, and I was actually planning to order all the interior doors with sound insulation…

Difference for what? Today, I would also like to have all interior doors as soundproof, but not because of the ventilation.

Is there a difference compared to other ventilation systems, or is it the same for all that air exchange between the individual rooms is required?

There are systems that provide both supply air and exhaust air within the same room.

However, normally there is always one room for supply air and another for exhaust air.

Exactly. Typically, living rooms, bedrooms, children’s rooms, studies, and guest rooms receive supply air vents. Fresh air is blown into these rooms. Bathrooms, guest toilets, kitchens, and utility or storage rooms, on the other hand, have exhaust air vents where used air is extracted. Hallways and staircases usually do not have any vents. This means that the fresh air must flow from one room, through the hallway, to another room with an exhaust vent. There are various methods for this airflow transfer, some with and some without sound insulation. It can happen through the door or through the wall (transfer valve).

If airflow transfer is not possible or not desired, each room needs both supply and exhaust air. This involves more effort during construction. Additionally, the air circulation within the room must be managed carefully (to avoid short circuits), which can be more challenging than with airflow transfer. In such cases, a decentralized system might be worth considering, where airflow transfer can also be eliminated.

Could you please explain the options for air transfer WITH sound insulation?

Thanks a lot