Ventilation systems

  • Erstellt am 2013-02-19 19:05:41

Selbermacher-1

2013-02-19 19:05:41
  • #1
In a German daily newspaper, I read an interesting report about mechanical ventilation systems. According to it, 90% of all single-family house ventilation systems malfunction and cause excessive costs. Operating costs and maintenance are often more expensive than assumed, and the energy-saving effect is questionable.

We ourselves do not have a ventilation system; we still ventilate manually, which works well; how about the forum users, have you had problems with your system, are the costs within the planned range?
 

Hubertus-1

2013-02-25 20:16:29
  • #2
This discussion also exists here with us. On minergie.ch, it is addressed. Supporters of regulated ventilation systems emphasize that the indoor air always remains fresh and hygienically impeccable. However, this presupposes that such systems are always and regularly maintained. Filter changes, pipe inspections (also by video)... Minergie.ch assumes conscientious regular (and certainly not cheap) maintenance by the residents in its assessment that regulated ventilation systems are indispensable for modern, energetically optimally designed houses. For me, that’s nothing; I prefer to open the window.
 

Basler-1

2013-02-26 18:07:00
  • #3
As with all technical systems, it depends on the users and proper usage. If I don't take my car for regular inspections, it can simply break down sometimes. Nobody then says that cars are not mature and therefore prefers to ride a bike. It is certainly almost strange what technical effort is made to live energetically optimally, but that is the times and technological innovations have their good reason.
 

MODERATOR

2013-02-27 19:35:17
  • #4
Hello Basler,

that is true, but cars have been a known technology for 100 years; people are aware of inspections, etc. Everyone knows that a car only runs 100,000 km if it is regularly refueled, repaired, and technical safety is maintained.

With mechanical ventilation systems, especially those with heat recovery, however, manufacturers and planners (energy planners) rarely point out the necessity of regular inspections at short intervals (this can be every 6 months at the worst!), and even less so the associated follow-up costs.

Even I, as an architect, am often told that changing filters is no problem, every few years, one can do it oneself (but this is not true); the ducts remain clean for a long time, and we have never heard of microbial infestation, etc. (this is just as untrue).
In my opinion, to praise the advantages of ventilation systems, the technical necessity of follow-up work and costs is concealed.
If inspection costs, costs for filter changes, duct inspections, etc. were mentioned directly, that would be better. The customer would then know what to expect.
 

Hubertus-1

2013-02-27 19:39:57
  • #5
That's exactly what I mean. When I ventilate through the windows, as my parents have already practiced, you can't go wrong and it doesn't cost anything. The air is not preheated in that case, but ventilation systems with heat recovery don't necessarily operate energy-efficiently either; the operating costs compensate for the heat loss that you have to make up for with window ventilation.
 

Basler-1

2013-02-27 19:42:20
  • #6
With window ventilation, you can hardly do anything wrong if you operate the window handles correctly :rolleyes: and do not practice tilt-window constant ventilation.
 

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