ᐅ Decentralized ventilation system with minimal visibility on the exterior facade
Created on: 8 Apr 2021 11:18
H
Hausbauin2021
Hello dear building forum,
We are constructing a 210 sqm (2,260 sq ft) single-family house to KfW 55 standard and want a decentralized ventilation system. (We have deliberately decided against a central ventilation system, but this is not the topic here.)
I am looking for a system that is discreet on the exterior of the house, for example, integrated into the window reveals. We do not want to have fans visible on the facade in every room.
Who has experience and can recommend something? I look forward to the exchange. Best regards
We are constructing a 210 sqm (2,260 sq ft) single-family house to KfW 55 standard and want a decentralized ventilation system. (We have deliberately decided against a central ventilation system, but this is not the topic here.)
I am looking for a system that is discreet on the exterior of the house, for example, integrated into the window reveals. We do not want to have fans visible on the facade in every room.
Who has experience and can recommend something? I look forward to the exchange. Best regards
Bookstar schrieb:
I know that some general contractors (GCs) avoid this because it requires more effort during the construction phase, especially regarding the planning. Wherever possible, GCs tend to avoid detailed planning altogether. With decentralized systems, holes are simply made in the exterior walls, which is a minor task for the HVAC installer. For centralized systems, the installer needs to be “involved” when the “reinforced concrete slab” is completed. Because “centralized” means the entire building is treated as a complex installation, integrated tridimensionally and collaboratively across trades by the system. It’s a completely different world. Simply put: centralized is like the Earth being a sphere, while decentralized is like it being flat. This greatly increases the pool of capable subcontractors, affects significantly fewer building components (points of complication), and is also more flexible to schedule. GCs make their money by efficiently producing enclosed space. Decentralized units can be installed by the same screed specialists who also box in downpipes, foam windows, and point brickwork. That counts. My conclusion (and, as always, you can love or hate me for being subjective): in architect-designed and -managed houses you have the choice; in design-build GC projects run by drafting technicians, choosing the centralized option significantly increases the number of advisable expert site visits. Note: GCs with in-house heating, cooling, and ventilation tradesmen are rather rare, and decentralized controlled residential ventilation involves more building components, including those from the core GC trades (masonry, concrete, or carpentry works). So it usually acts as a subcontractor interface within the GC trade structure.
Bookstar schrieb:
Luckily, the myth of contaminated pipes is now heard very rarely, like something from a bygone era. Those who still believe in that myth hardly ever talk to bar system cleaners.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
H
hampshire17 Apr 2021 16:33Bookstar schrieb:
Fortunately, the myth about dirty ducts is now rarely heard and belongs to the past.. ..and in the VDI guideline 6022 regarding ventilation systems, hygiene, and building services.
It is no coincidence that an annual maintenance of all ducts is recommended when "persons are expected to stay in the rooms for more than 30 days per year as intended." This should apply to a residential building. For decentralized ventilation systems, a filter change every six months is recommended. It is understandable from a sales perspective that manufacturers may take a different stance than the VDI on this topic.
Ventilation systems certainly offer comfort benefits – but I am happy to do without them.
hampshire schrieb:
...and in the VDI guideline 6022 regarding ventilation systems, hygiene, and building technology.
It is not without reason that annual maintenance of all ducts is recommended when "persons are expected to stay in the premises for more than 30 days a year." This should apply to a residential building. For decentralized ventilation systems, a filter change every six months is recommended. That manufacturers take a different stance on this topic than the VDI is understandable from a sales perspective.
Ventilation systems certainly offer comfort advantages – I prefer to do without them. Can you provide more details on this? And of course, recommendations are always debatable; as a homeowner, you probably know that well. But for those with concerns, there are plenty of systems that can be cleaned by yourself. Otherwise, having a professional service the system every five years shouldn’t be a major issue as part of regular home maintenance.
H
hampshire17 Apr 2021 16:45Bookstar schrieb:
Could you provide more details on that?The reference to the VDI Guideline 6022 is quite specific.Bookstar schrieb:
But for those who have concerns, there are plenty of systems that can be cleaned by yourself.The concerns may be about ease of cleaning, but the pipe systems are less straightforward. Let’s just say physics meets endoscopy. ;-)https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
11ant schrieb:
The vents might be easy to clean, but the pipe systems are less so. I’d say physics meets endoscopy ;-) What do you mean? What does that have to do with physics?
Otherwise, I don’t find anything about single-family houses in the VDI guideline; I think it’s more about large industrial facilities, which have completely different requirements.