ᐅ Controlled residential ventilation supply air in the living area near the sofa
Created on: 29 May 2021 14:19
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kasse-tk
Hello dear forum members,
I have been an active reader of this forum for some time now, but I have reached a point where I need to ask a question. We are currently finalizing the construction plans for our semi-detached house, with construction scheduled to start in July. The HVAC contractor has recommended positions for the supply and exhaust vents of the mechanical ventilation system. Everything is clear so far, except for the location of the fresh air supply in the living area (marked in red in the attached picture). According to the HVAC contractor, the position so close to the sofa is acceptable and there should be no drafts, but we have some concerns. However, we can’t really think of a better location. If placed further to the left, the airflow would pass over the sofa area on its way to the kitchen exhaust; if placed further to the right, the left side of the living room would be without fresh air.
What do you think?
Thanks in advance!
Best regards, kasse-tk
I have been an active reader of this forum for some time now, but I have reached a point where I need to ask a question. We are currently finalizing the construction plans for our semi-detached house, with construction scheduled to start in July. The HVAC contractor has recommended positions for the supply and exhaust vents of the mechanical ventilation system. Everything is clear so far, except for the location of the fresh air supply in the living area (marked in red in the attached picture). According to the HVAC contractor, the position so close to the sofa is acceptable and there should be no drafts, but we have some concerns. However, we can’t really think of a better location. If placed further to the left, the airflow would pass over the sofa area on its way to the kitchen exhaust; if placed further to the right, the left side of the living room would be without fresh air.
What do you think?
Thanks in advance!
Best regards, kasse-tk
S
Strahleman31 May 2021 20:50kasse-tk schrieb:
I sketched the idea of the supply air in the corners; did I understand it correctly? Yes, that’s exactly how I would implement it, and it’s done the same way in our case (36m² (387 sq ft) living and dining area). The two supply air vents are connected using one or two ducts depending on the calculated airflow.guckuck2 schrieb:
A reasonable question.
With 43 sqm (462 sq ft) and a ceiling height of 2.5 m (8 feet), the room volume is approximately 107.5 cubic meters (3,795 cubic feet).
At an air exchange rate of 0.3–0.4 per hour, the supply air volume would need to be between 32.25 and 43 cubic meters per hour (19–25 cubic feet per minute).
Achieving this with a single duct is usually not possible, so a double connection is necessary. This increases the risk of airflow noise and drafts. It always depends on the duct diameter and the ventilation outlet.
At our place, I don’t hear anything at 30 cubic meters per hour (18 cubic feet per minute). But when I really want to push it and ventilate at 60 cubic meters per hour (35 cubic feet per minute) or more, I start hearing some noise gradually.