Open kitchen: exhaust or recirculation in controlled residential ventilation & KfW55

  • Erstellt am 2020-01-13 17:32:34

Mottenhausen

2020-01-14 09:58:41
  • #1


Well, it tries to continuously regulate supply and exhaust airflows to identical air volumes (for example, 120m³/h out and also 120m³/h in). If an additional, very strong exhaust airflow arises, the balance is no longer correct. Counteracting this is only possible to a limited extent with normal controlled residential ventilation systems, where the limit is reached at 300 - 400m³/h.

So, with us: also recirculated air via downdraft extractor (mainly to separate water/fat in the carbon filter, not to reduce odors) and the controlled residential ventilation runs at a higher level early/midday/evening, and then odors dissipate accordingly quickly.

Especially due to the arrangement of the fresh air supply in living/sleeping rooms, no kitchen odors can get there. Fresh air always comes into the rooms. Air is extracted in the hallway, utility room, kitchen, and bathrooms, so kitchen odors tend to spread there (for us actually noticeable only in the utility room and kitchen itself).
 

Bookstar

2020-01-14 10:11:48
  • #2

I'm not talking about boiling pasta or Thermomix.
 

fragg

2020-01-14 10:17:34
  • #3
a concrete example where a range hood from the last millennium is useful. My child likes pasta, and I don’t have a Thermomix.
 

Mottenhausen

2020-01-14 14:52:40
  • #4
That is subjective anyway. When you fry fish and an hour later someone who didn’t eat with you comes into the house, they say "you probably had fish?" regardless of whether it was convection or exhaust air or anything else.
 

hampshire

2020-01-14 15:43:57
  • #5

We chose a recirculation extractor hood from Falmec, model Marilyn, because we liked it and the simple ceiling construction at this spot would not have allowed a concealed air duct. Exhaust would have meant a downdraft and then no free surface induction. Contrary to my fears, the odor reduction provided by the hood is good enough for us.
 

opalau

2020-01-14 15:50:54
  • #6


We have a controlled residential ventilation system but are not planning separate supply air for now. I’ll see how it works in practice, what the ventilation system (Zehnder 450) indicates, whether a window needs to be opened, etc. We also have a relatively large volume with about 230 sqm and an insulated attic. Our exhaust air wall box is insulated (Naber Thermobox).
 

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