Central ventilation system existing planning

Would it be possible for someone to take another look at my existing ventilation system planning? Since this is a renovation of an existing building, the positioning of the valves is unfortunately very limited.

Project information:
Built in 1961
Two people (no children)
In the office (ground floor) there are usually 2 people present most of the time

EG:
Between the living room and kitchen/dining area there is no door, but a 170 cm wide wall opening.
Between the kitchen and hallway there is a 100 cm wide sliding door.
Between dining and pantry there is an approx. 80 cm wide sliding door.
The pantry is unheated (indirectly heated through the heating circuit distributor)

OG:
The supply and exhaust valves are all installed in the ceiling (here I can partially route the pipes through the ribbed ceiling)

The ventilation unit is located in the basement

On the ground floor and upper floor, I will create ventilation openings at some points in the wall, which are marked in purple:
OG: between bathroom (WC area) and hallway (possibly also bedroom to hallway)
EG: above the door from office to hallway and pantry to hallway

I have certainly forgotten many points to describe.
If anything is unclear, please ask directly