ᐅ Negative pressure control for air-to-air heat pump

Hello everyone,

Our black stove requires a negative pressure monitor for the chimney, which is needed because of the air-to-air heat pump heating system. The chimney sweep wrote the following to me: I don’t have a specific negative pressure monitor in mind. What’s important is that the exhaust fan automatically switches off when a negative pressure of 4 pascals is reached.

We have already planned a connection to the chimney. See the attached picture.

Now my question is, which one do I need.

The system is a Proxon from Zimmermann.
Our electrician can install it, but I am supposed to purchase the monitor.

Thanks in advance and best regards

Zenjamino

Doesn't matter. Leda Luc, Broko, P4, etc.
P4 is good and affordable (I had it in my last house), Broko I'm currently installing (for combined fireplace, ventilation, and range hood).

Thanks in advance. So these are the models that are installed for this purpose. How does the 6-meter (20-foot) hose for pressure measurement work then? I don’t want to drill a hole to the outside, or am I misunderstanding and such a device just needs to be connected at the chimney without measuring outside?

Zenjamino schrieb:

How does it work with that 6-meter (20-foot) hose for measuring the pressure?

The P4 measured the flue pipe in relation to the utility room. The Broko will measure from the flue pipe to the chimney room.
You need to discuss this with your chimney specialist.

Oh, and remember to install a temperature sensor. That way, the pressure monitor only operates when the chimney is actually in use.

Thanks again. I still don’t fully understand it.
We have a wood-burning stove in the living room, and the ventilation system is located in the basement, where the “used” air is also exhausted.
We had a duct installed from the stove to the utility room.
The wood stove will be operated as a room-air-independent system.

What would make the most sense in this case?

Broko uses wireless technology for everything, but we wouldn’t need that here since the ducts are already installed.
In your opinion, where does it make the most sense to measure this annoying negative pressure?

Thanks again.

Regards,

Zenjamino

Zenjamino schrieb:

We had a duct installed from the chimney to the utility room.

Then use a P4. Differential pressure between the flue pipe and the living room (this way, the device can also be easily mounted near the chimney). With the connected duct, the P4 then switches off the power to the heat pump in the utility room.

This is how I would do it (or rather, how I did it in the last house in consultation with our chimney sweep).