Negative pressure monitor in combination with a range hood

  • Erstellt am 2024-04-10 15:42:33

Flitz86

2024-04-10 15:42:33
  • #1
Hello everyone,

after some searching here in the forum, I have come to the conclusion that none of the topics really fit my situation. Therefore, a new question on this.

Initial situation:
We have installed 2 chimneys in our house (really 2 separate chimneys, which are standing next to each other). The chimneys basically allow both a room air-dependent and a room air-independent operation. At the same time, we will install decentralized fans.
According to the district chimney sweep, this means that we need a pressure monitor to switch off the fans in case of negative pressure.
The kitchen and living/dining room (where the chimneys are located) are designed quite openly.

First question (somewhat off-topic for the kitchen planning category):
Does anyone know a negative pressure monitor that can monitor 2 flues? Ultimately, the pressure in the room, the pressure outside, and the temperature of 2 smoke pipes would have to be monitored. After all, the whole logic should only be triggered when the stove is actually on.

Now to the actual topic "range hood":
We would like to install a range hood in the kitchen.
According to the chimney sweep, however, this causes the problem that it directly creates negative pressure and then the pressure monitor always triggers.
From my understanding, this should be "switchable" via the info (temperature measurement) from the pressure monitor whether a stove is on or not?

Or how does the whole thing additionally behave with the topic "window contact"? Is this also necessary in this scenario with decentralized fans or not?
That is, exhaust may (can) only run if the stove is off OR stove is on and no negative pressure AND window open?

And to make it not too easy:
I have seen that there are also hybrid range hoods, i.e. a combination of exhaust and recirculation.
In this case, recirculation would always work, but exhaust only as described above – is it possible to control/map something like this?
Has anyone already gained experience here?

Regards Chris
 

Stephan—

2024-04-11 08:54:59
  • #2
Haha, I already thought we were crazy with central controlled residential ventilation, extractor hood, independent chimney, pressure monitor and window contact. But you guys,… that tops it again!

We have the advantage that the chimney is still inactive and therefore the pressure monitor/window contact also do not need control (for now). My electrician only said something like "you’d have to create a logic that covers all scenarios." But how, we haven’t reached that point yet. Basically, a big problem is solved by the fact that when a window is tilted open, the pressure balance is definitely achieved. Therefore, a window contact switch should definitely be installed. All other systems, extractor, chimney, controlled residential ventilation just “pull” air, so it definitely has to flow in from somewhere (in that case).

But keep working on your topic, it seems to be going into operation more with you than with us. By the way, we decided on a "Huber" monitor.
 

Zenjamino

2024-04-11 16:12:13
  • #3
We have an air-to-air heat pump, the manufacturer signed such a sheet and we did not have to install a pressure monitor with the room air-independent stove. I have also described this somewhere here in the forum. But maybe our case is different.
 

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