ᐅ Ventilation Concept

I am considering the ventilation concept for a house with two full floors plus an attic.

Attic: It is accessible via a folding ladder and is not intended for use. We plan to install the ventilation system there and easily serve the first floor from this location. The top-floor composite ceiling will be ordered with the necessary placeholders for ceiling vents accordingly.

Now the question is how to best supply the ground floor. A discussion with a heating technician resulted in the recommendation to run the ducts in or on the ground floor ceiling to reach the rooms on the ground floor. This sounds logical at first. However, the ground floor has a long corridor running across the entire width of the house. All ground floor rooms are accessible from this corridor. An alternative idea was to install a suspended ceiling in the corridor, place the ventilation ducts there, and then branch out into the rooms. This does not necessarily mean suspending every room ceiling; instead, ducts would pass through the corridor walls into the rooms with supply air throw vents installed. Does anyone have experience with this? I am only familiar with these from industrial halls and wonder if they are as efficient and quiet as standard ceiling vents. Does this make sense? Does it save anything? (Duct lengths would be reduced, after all)

Thanks & regards

I can’t imagine that it would be cheaper. Additionally, you also lose ceiling height in the hallway.