ᐅ Negative pressure monitor in combination with kitchen exhaust hood

Hello everyone,

After some searching through the forum, I’ve come to the conclusion that none of the existing topics really fit my situation. So, here’s a new question.

Initial situation:
We have two chimneys installed in our house (actually two separate chimneys standing next to each other). The chimneys basically allow for both room air-dependent and room air-independent operation. At the same time, we will be installing decentralized fans. According to the local chimney sweep, this means 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) have an open layout.

First question (somewhat off-topic for the kitchen planning category):
Does anyone know of a negative pressure monitor that can monitor two flues? In the end, the pressure in the room, the outside pressure, and the temperature of two flue pipes should be monitored. The logic should only be triggered if the stove is actually operating.

Now to the main topic, the “range hood”:
We would like to install a range hood in the kitchen. According to the chimney sweep, this causes a problem because it directly creates negative pressure, which always triggers the pressure monitor. From my understanding, this should be “switchable” via information (temperature measurement) from the pressure monitor to detect whether a stove is on or not, right?

Also, how does this relate to the issue of the “window contact”? Is this required in this scenario with decentralized fans or not? In other words: The extractor may only run if the stove is off OR the stove is on and there is no negative pressure AND the window is open?

And to make it more complex:
I have seen that there are also hybrid range hoods, meaning a combination of extractor and recirculation. In this case, the recirculation would always work, but exhaust air only as described before—can this be controlled or managed like that? Has anyone had experience with this?

Regards,
Chris

Haha, I thought we were crazy with centralized controlled residential ventilation, cooker hood, independent fireplace, pressure monitor, and window contact sensor.
But you guys... that tops it even more!

We have the advantage that the fireplace is still inactive, so the pressure monitor/window contact sensor don’t need to be controlled for now.
My electrician just said something like, “You’d have to create a logic that covers all scenarios.” But we haven’t gotten that far yet.
Basically, a major problem is solved if a window is tilted open, ensuring the pressure balance is definitely achieved.
So a window contact switch should definitely be installed.
All other systems—exhaust fans, fireplace, controlled residential ventilation—only pull air, so the air must necessarily flow in from somewhere (in this case).

But keep an eye on your topic, it seems to be in operation for you sooner than for us.
By the way, we decided on a “Huber” monitor.

We have an air-to-air heat pump. The manufacturer signed a document, so we did not have to install a pressure monitor with the room air-independent stove. I have also described this somewhere in this forum before. But maybe our case is different.