Hello everyone,
Yesterday, we discussed the ventilation plan for the mechanical ventilation system on the construction site. The ducts are planned to be installed in the floor structure on the first floor and then drilled downward. On the first floor, the supply air should ideally be delivered through floor outlets in front of the windows to save usable space. However, we decided to install the outlets about 30cm (12 inches) higher on the wall. Although this means an additional 90-degree bend in the ductwork—which I understand should generally be avoided—the advantage is that no dirt or liquids can enter the opening.
Now to the main question.
In the living room, two air outlets were initially planned. Since we wanted to move one of them (above the coffee table), the suggestion came up to use only one outlet instead. The size will be properly calculated by the HVAC installer.
Are there any advantages or disadvantages to this? I read that the noise level might be higher with a single outlet. However, the general contractor said a larger duct would be installed accordingly.
For now, I am convinced by this explanation. The general contractor noticed that I felt the decision was made a bit too quickly and offered to install two outlets if desired. We are planning to start with one large outlet, and I have until the end of next week to decide.
My wife sees the advantage that a single outlet is less noticeable, and only one hole needs to be drilled through the ceiling.
The living room is approximately 34m2 (366 square feet).
Best regards,
Fanta
Yesterday, we discussed the ventilation plan for the mechanical ventilation system on the construction site. The ducts are planned to be installed in the floor structure on the first floor and then drilled downward. On the first floor, the supply air should ideally be delivered through floor outlets in front of the windows to save usable space. However, we decided to install the outlets about 30cm (12 inches) higher on the wall. Although this means an additional 90-degree bend in the ductwork—which I understand should generally be avoided—the advantage is that no dirt or liquids can enter the opening.
Now to the main question.
In the living room, two air outlets were initially planned. Since we wanted to move one of them (above the coffee table), the suggestion came up to use only one outlet instead. The size will be properly calculated by the HVAC installer.
Are there any advantages or disadvantages to this? I read that the noise level might be higher with a single outlet. However, the general contractor said a larger duct would be installed accordingly.
For now, I am convinced by this explanation. The general contractor noticed that I felt the decision was made a bit too quickly and offered to install two outlets if desired. We are planning to start with one large outlet, and I have until the end of next week to decide.
My wife sees the advantage that a single outlet is less noticeable, and only one hole needs to be drilled through the ceiling.
The living room is approximately 34m2 (366 square feet).
Best regards,
Fanta
In our case, the air outlets are located on the floor, and the exhaust vents are positioned at the top of the ceiling or wall – but that doesn’t really matter. It is certainly possible to have two outlets instead of one, but this must be precisely calculated by the system designer, including the amount of air extracted at each exhaust vent.
Fantamoax schrieb:
Hello Cascada,
thank you for your response.
Of course, this is calculated, so I could understand the statement of the general contractor as well as that of the system planner. I just wanted to know whether a larger exhaust valve could possibly have disadvantages.
Good luck
Fanta
Well, if you have one larger exhaust grille instead of two smaller ones, exactly the same amount of air will come out of it as from the two smaller ones combined... otherwise, the air exchange rate in that room wouldn’t be correct.
Bowlstriker11 Feb 2015 08:56Hello,
please avoid air outlets in the floor. Dirt easily falls inside and they require cleaning. The systems are, of course, calculated, but the air volumes are adjusted during commissioning. I wouldn’t install two jet outlets for 34m2 (365 sq ft)!
Aren’t the air outlets adjusted by air volume, or is it different in your case? Which system is being used?
Regards, Mirko
please avoid air outlets in the floor. Dirt easily falls inside and they require cleaning. The systems are, of course, calculated, but the air volumes are adjusted during commissioning. I wouldn’t install two jet outlets for 34m2 (365 sq ft)!
Aren’t the air outlets adjusted by air volume, or is it different in your case? Which system is being used?
Regards, Mirko
Bowlstriker schrieb:
Hello,
please avoid floor air outlets. Dirt and debris fall inside, and they need to be cleaned. The systems are of course calculated, but the air volume is adjusted during commissioning. I wouldn’t install two supply air outlets in a 34m2 (365 ft2) area!
Aren’t the air outlets also adjusted according to the air volume, or is that not the case with your system? Which system are you using?
Regards, MirkoNo floor air outlets? That’s nonsense. What would fall inside? In our living room of nearly 40m2 (430 ft2), we also have two floor air outlets and an exhaust vent in the ceiling. This way, the air is exchanged across the entire room (naturally without drafts). The air outlets are located under the windows and have attractive stainless steel covers.
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