ᐅ Mechanical Ventilation with Heat Recovery – Planning the Locations for Supply and Exhaust Air

Hello everyone,

The planning for our semi-detached house is becoming more concrete. Now we need to determine the positions of the outlets for the central mechanical ventilation system with heat recovery.

I have read quite a bit on the topic and tried to consider the usual best practices. However, it is quite overwhelming at first and leaves some uncertainty. That’s why I would appreciate it if you could take a look based on your experience.

In general, everything is initially planned as ceiling outlets. However, the concept of displacement ventilation also makes sense to me, so wall outlets near the floor for the supply air could also be considered. What are your thoughts on this?

Yellow dots = Extract air
Red dots = Supply air
Blue dots = Alternative supply air (as a possible alternative position for the same room instead of the red dot)

Ground floor:

• The additional table indicated in the office will ultimately not be placed there.
• I am unsure whether the supply air in the hallway should preferably be near the front door or not.

Upper floor:

• The alternative supply air position is meant to better cover the hallway area. Or is this not relevant, and is it more important that air is supplied directly into the dining/living area?
• Would it be better to have two outlets in the large living and dining area to minimize noise?

Attic floor:

• The children’s rooms are a bit of a headache because it is very difficult to predict exactly how the furniture will be arranged at this stage.
• In the slightly larger children’s room, I’m also not certain about the door position yet. It might be placed all the way to the left (opposite the bedroom door). In that case, the supply air would need to be located elsewhere.

Thank you very much in advance!

Markus