ᐅ Distribution system (supply and exhaust air) integrated into the upper floor slab
Created on: 15 Dec 2017 17:52
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Christian NW
Hello everyone,
We have been offered the Reco Vair from Vaillant (general contractor: Town & Country).
The plan is to install all supply air ducts in the upper floor (UF) floor construction. However, all exhaust air ducts are also to be installed in the UF floor. This means that in the ground floor (GF), all supply and exhaust air ducts are located in the ceiling, and in the UF, all supply and exhaust air ducts are in the floor.
I have the following questions:
1. Let’s first consider only the supply air ducts in the UF. If all of these are located in the floor and the air transfer occurs via the gap beneath the room doors, will, for example, the bedroom receive enough air exchange? Or does the floor-level supply air flow directly through the door gap at floor level into the next room without adequately ventilating the entire bedroom? Especially in the bedroom, air exchange in the upper room levels is important. What do you think, will this still work?
2. Now regarding the exhaust opening in the UF: It is located in the bathroom. I consider it insufficient if this opening is only near floor level. After all, moisture from water vapor needs to be extracted, and that typically accumulates near the ceiling. From my perspective, this opening should therefore be placed near the ceiling. What are your thoughts?
I also have two more questions that arose from other discussions—perhaps you can help? I would really appreciate it:
3. What should be installed—disc valves or covers?
4. What nominal diameter should a supply or exhaust air duct have to avoid ventilation noise? (Our house has a living area of 180 m² (1937 ft²) distributed over GF and UF, with ceiling heights of 260 cm (102 inches) on the GF and 280 cm (110 inches) on the UF. It will be occupied by 4 people.)
5. What else should we consider to avoid noise disturbances? A quiet system with minimal operating noise is very important to us. Does anyone know how loud the Vaillant Reco Vair is? Would you hear it in the hallway if it is installed in the utility room, which is only separated by a standard door?
We have been offered the Reco Vair from Vaillant (general contractor: Town & Country).
The plan is to install all supply air ducts in the upper floor (UF) floor construction. However, all exhaust air ducts are also to be installed in the UF floor. This means that in the ground floor (GF), all supply and exhaust air ducts are located in the ceiling, and in the UF, all supply and exhaust air ducts are in the floor.
I have the following questions:
1. Let’s first consider only the supply air ducts in the UF. If all of these are located in the floor and the air transfer occurs via the gap beneath the room doors, will, for example, the bedroom receive enough air exchange? Or does the floor-level supply air flow directly through the door gap at floor level into the next room without adequately ventilating the entire bedroom? Especially in the bedroom, air exchange in the upper room levels is important. What do you think, will this still work?
2. Now regarding the exhaust opening in the UF: It is located in the bathroom. I consider it insufficient if this opening is only near floor level. After all, moisture from water vapor needs to be extracted, and that typically accumulates near the ceiling. From my perspective, this opening should therefore be placed near the ceiling. What are your thoughts?
I also have two more questions that arose from other discussions—perhaps you can help? I would really appreciate it:
3. What should be installed—disc valves or covers?
4. What nominal diameter should a supply or exhaust air duct have to avoid ventilation noise? (Our house has a living area of 180 m² (1937 ft²) distributed over GF and UF, with ceiling heights of 260 cm (102 inches) on the GF and 280 cm (110 inches) on the UF. It will be occupied by 4 people.)
5. What else should we consider to avoid noise disturbances? A quiet system with minimal operating noise is very important to us. Does anyone know how loud the Vaillant Reco Vair is? Would you hear it in the hallway if it is installed in the utility room, which is only separated by a standard door?
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Christian NW15 Dec 2017 23:50A difficult decision. On the ground floor, we have 17.5cm (7 inches) aerated concrete walls and a single door in front of them. How low would the threshold need to be to ensure noise-free conditions in the hallway? It’s very difficult to estimate. How can we assess this in advance?
Christian NW schrieb:
How low would the tread depth need to be to ensure noise-free walking in the hallway? Resonance frequencies do not have to reach high levels to become disturbing.
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Christian NW16 Dec 2017 00:06So, can we only decide based on good luck and hope that the noise level is acceptable?
You have been given two options. Avoid sound by designing the system accordingly and ensure that the sound does not leave the room. If this issue is important to you, you can now take appropriate measures. Especially since these do not cost a fortune. I don’t see a risk of overdoing it.