Number of air vents

Hello dear community,
Yesterday we discussed our ventilation plan for the controlled residential ventilation system on the construction site. It is planned that the ducts will be installed in the floor structure on the first floor and drilled downwards. On the first floor, the supply air should be delivered through floor outlets in front of the windows to save floor space. However, we decided to move the outlets about 30 cm up into the wall. Although the duct will then have one more bend (90 degrees, which should be avoided if I am correctly informed), the advantage is that no dirt or liquids can enter the opening.

Now to the actual question.

Initially, two air outlets were planned in the living room. Because we wanted to relocate one (above the coffee table), the suggestion was made to use only one air outlet. The size will be calculated accordingly by the heating engineer.

Are there any advantages or disadvantages? I once read that the noise level could possibly be louder. However, the general contractor said that a correspondingly larger duct would be installed.

For now, I have been convinced by that. However, the general contractor noticed that the spontaneous decision was a bit too quick for me. He offered to install two outlets as well. We are planning for one large outlet first, and I can decide by the end of next week.

My wife sees the advantage that one air outlet is less noticeable and that only one hole has to be drilled through the ceiling.

The living room is about 34 m2 in size.

Best regards

Fanta

With us, the air outlets are on the floor and the exhaust valves are each at the top in the ceiling or wall - but it does not matter. It is certainly possible to have two outlets instead of one - but this must be precisely calculated by the system planner - as well as how much is drawn through the respective exhaust valves.

Hello Cascada,

thank you very much for your reply.

Of course this is calculated, which is why I could understand the statement of the GU as well as that of the system planner. I just wanted to know if a larger outlet valve possibly has disadvantages.

Best regards

Fanta

Hello Cascada,

thank you very much for your reply.

Of course, this is calculated, which is why I could understand the statement of the general contractor as well as that of the system planner. I just wanted to know if a larger exhaust valve might have disadvantages.

Best regards

Fanta

Well, if you have one larger exhaust grille instead of two smaller ones, the same amount of air will come out of it as from the two smaller ones together... - otherwise the air exchange rate in this room would not match.

Hello,

please no floor air outlets. Everything falls in and they have to be cleaned. The systems will of course be calculated, but the adjustment of the quantities only takes place during commissioning. I would not make 2 lift outlets for 34m2!
The air outlets are also adjusted in terms of air volume, aren't they, or is that not the case with you? Which system is being used?
Regards Mirko

Hello,

please no air outlets from the floor. Everything falls in and you have to clean them. Of course, the systems will be calculated, but the adjustment of the quantities only takes place during commissioning. I wouldn't make 2 lift outlets for 34m2!
The air outlets are also adjusted according to the air volume, aren't they? Or is that not the case for you? Which system is being used?
Regards Mirko

No air outlets on the floor? Nonsense. What falls in? We have two floor outlets and an exhaust valve (ceiling) in the living room, which is just under 40sqm. This way, the entire air is exchanged across the room (of course without drafts). The air outlets are positioned under the windows and have a nice stainless steel cover.