Hello,
We are building a KfW 70 house with a general contractor, including a central ventilation system with humidity recovery. On the upper floor, the ceiling will remain open, so the designer cannot install either supply or exhaust ducts within the ceiling.
His proposed solution (allegedly in consultation with the ventilation installer) is either an air outlet 30cm (12 inches) above the floor in the wall as a ventilation grille or at 2m (6.5 feet) above the floor in a typical round shape. He prefers to place the supply air outlets next to the doors (since these are the shortest routes for ductwork to the rooms). To me, it looks terrible to always see a ventilation valve right next to the door as you leave the room... 😱
My questions are:
Best regards and thanks! Max
We are building a KfW 70 house with a general contractor, including a central ventilation system with humidity recovery. On the upper floor, the ceiling will remain open, so the designer cannot install either supply or exhaust ducts within the ceiling.
His proposed solution (allegedly in consultation with the ventilation installer) is either an air outlet 30cm (12 inches) above the floor in the wall as a ventilation grille or at 2m (6.5 feet) above the floor in a typical round shape. He prefers to place the supply air outlets next to the doors (since these are the shortest routes for ductwork to the rooms). To me, it looks terrible to always see a ventilation valve right next to the door as you leave the room... 😱
My questions are:
- Does it actually make sense to plan supply air next to the door (where air is usually extracted)? Can the supply air still flow through the room adequately in this position? Where would be the ideal location for the outlet? (I had originally thought of it—naively—diagonally opposite the door.)
- Is supply air through an outlet just above floor level common? And where do these specifications come from: either 30cm (12 inches) above the floor, or 2m (6.5 feet) above the floor?
Best regards and thanks! Max
Hello,
As a general rule: not everything that looks appealing or is desired necessarily aligns with technical functionality or efficiency.
If it is a room with only supply air and the adjacent corridor or similar is acting as an overflow area, “short circuits” can occur and sufficient air exchange may not be guaranteed.
Important for general contractor projects: Make sure to obtain all necessary calculations such as air volumes, heating load, etc.
Best regards
MaxS schrieb:
...therefore, the planner can no longer install either supply or exhaust air ducts in the ceiling.
As a general rule: not everything that looks appealing or is desired necessarily aligns with technical functionality or efficiency.
MaxS schrieb:
...He usually plans the supply air right next to the doors (these are simply the shortest duct routes to the room).
If it is a room with only supply air and the adjacent corridor or similar is acting as an overflow area, “short circuits” can occur and sufficient air exchange may not be guaranteed.
Important for general contractor projects: Make sure to obtain all necessary calculations such as air volumes, heating load, etc.
Best regards
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