Central Controlled Residential Ventilation: Supply and Exhaust Air, Door Bottom Gap

Hello.

We are currently planning the outlets for supply and exhaust air for the (concrete) ceilings. Currently planned:

Basement: exhaust air in all rooms except storage cellar (neither supply nor exhaust air at the moment)
Ground floor: dining/living/kitchen (one room) both supply and exhaust air, office supply air, bathroom exhaust air
Attic: bedroom, children's room each supply air, bathroom exhaust air

A floor gap of 5-8mm has been recommended for the room doors to avoid problems with air transfer.

Questions:
Are your concepts similar? Any experiences?
Does the supply air work only by overflowing through the room door (in the basement the air even has to come through the stairwell)?
Opinions on the floor gap (5mm seems normal to me)?

Thanks in advance.

Are you actually planning the location of all supply and exhaust air outlets yourselves? With us, this is planned by an engineering firm.

Hello ,

no, the ventilation system is planned by a sanitary and heating specialist.

I would try to keep supply and exhaust air balanced on each floor. As a layperson, I imagine this helps reduce airflow between floors. Also, typical supply air rooms like bedrooms eventually develop mustiness, which I do not want to let flow through stairwells down to the basement to be extracted there. Anyway, that would only be an option if the basement is within the heated envelope (I assume so).

Hello ,

thank you for your reply. That wouldn't be quite balanced for us. Yes, the basement is within the heated envelope.

How about others? Where do you each have supply air and where exhaust air?

How does it look with others? Where do you each have supply air and where exhaust air?

So for us the heating engineer planned like this (without basement):
Ground floor supply air: 2x living room, 1x dining room
Ground floor exhaust air: 2x kitchen, 1x guest WC, 1x utility room/freezer

Upper floor supply air: 1x child1, 1x child2, 1x office, 2x bedrooms
Upper floor exhaust air: 1x dressing room, 2x bathrooms

2x means 2 ducts per ceiling hole
1x means 1 duct per ceiling hole