ᐅ Negative pressure monitor / chimney 4 Pa?

You’re always making loud claims, but apart from speculation, there’s nothing solid – if you bring this up with the local chimney inspector, they’ll just smile wearily and walk away. Entire forums? You tend to exaggerate...

By the way, carbon monoxide poisoning is not uncommon, and people often don’t notice anything at all...

You can keep playing the fool, but no one will care.

Just because you can’t imagine it doesn’t mean it’s nonsense.

Manipulation? I’m simply saying it could be a failure of the fresh air ventilator, and then you have your explanation...

But of course, it’s all exaggerated and typically German.

Payday schrieb:
please show me a court ruling where a chimney sweep had to pay even 1 single euro to anyone for anything.

Due to current circumstances and data protection, this is unfortunately not possible. Also: not everything ends up in court!

Sebastian79 schrieb:
If you take that to the local chimney inspector, they will just smile tiredly at you and then walk away.

After initially doubting this profession, I have come to trust them.

These professionals are very responsible.

Their word simply counts. There is hardly any way to oppose them.

However, it is possible to argue your case with the right documents and expertise. For this, you really have to be thoroughly prepared and able to prove everything. That’s my experience. My last discussion on this topic lasted almost 3 hours.

My former "enemy" (the BSFM) has almost become a friend, and he now has a long-term contract from me.

Thorsten

We decided to have the Leda LUC-2 installed. We were quite naive about the whole process. We knew that the switch for the decentralized ventilation system was a special request, so we thought the matter was settled and that we had a room air-dependent stove. Unfortunately, that was not the case. Our electrician later connected the ventilation to the circuit breakers and ran a cable from there to the LUC. We had many phone calls with the chimney sweep beforehand. It’s best to involve the chimney sweep regarding the model right from the start.

Hi,

ypg schrieb:
This has less to do with building regulations. There is the SchfHWG, and from §8 onwards, the duties of the district chimney sweep are addressed.

By the way, the BSFM carries out sovereign tasks – in that sense, they put their reputation and license, essentially their livelihood, on the line if they are careless. Carelessness also includes approving something that they consider unsafe.

It is not called arbitrariness; it is called discretionary power!

Happy Easter!

What you are describing is precisely the definition of _arbitrariness_. It is completely irrelevant whether something is "unsafe in their eyes." What should count is solely whether it is objectively unsafe. And that is definitely clear and possible to define. The physics of a chimney and the thermodynamic processes of combustion follow certain laws, namely natural laws. These are the same all over the planet; there is simply no room for discretionary judgment!

If a particular setup of chimney, stove, ventilation, and range hood is safe in Hamburg, then it is also safe in Munich, Hintertupfingen, and Timbuktu. It is more than just silly to make this dependent on the goodwill of whoever happens to be responsible by chance.

Apart from this silliness, such a non-objective decision-making process also opens the door wide for errors. It can just as easily happen that the BSFM approves something where they should have actually said no.

I doubt anyone would voluntarily get into a car whose brakes were designed and tested according to "discretionary power"...

Please do not misunderstand me; the usefulness of a pressure monitor is unquestioned here. I am just once again amazed, for the umpteenth time, at how completely unregulated and basically random many things in construction (and everything surrounding it) are. In mechanical and plant engineering, I have to deal with countless regulations that prescribe every detail, so I can really only compare building regulations to the Wild West...

Somewhat stunned regards,

Andreas

Payday schrieb:
Of course, he has to show you the basis if he wants something from you. Otherwise, you just refuse the changes and he has to report it. By then at the latest, it will become clear whether his demands are justified. And I completely rule out that anyone in Germany has to be liable for anything. Please show me a court ruling where a chimney sweep had to pay even one euro to someone for anything. It's all huge scare tactics and nonsense because he uses the simplest tricks to talk his way out (he only inspects the condition exactly at the time of the inspection; parameters can already have changed by the time he leaves...).

A chimney certified according to DiBt guidelines is completely sufficient, as there is no technical condition under which the ventilation system can build up a significant negative pressure—except through extreme, senseless manipulation of the system (all supply air ducts in the house would have to be sealed airtight at the same time, which makes no sense and cannot happen on its own). And then you are actively involved and can prevent damage. It’s not like you suddenly collapse.

There are entire forums against chimney sweeps, where they come with totally exaggerated demands and courts have to deal with this nonsense. Either there is a clear law and you’re out of luck, or there isn’t one and the chimney sweep is just talking nonsense.

As I already said, for new builds it's better to choose the pressure monitor instead of just relying on the DiBt certification. Then the chimney sweep has no leverage (simply because everything has been done correctly), and theoretically, you can use any chimney you want.

Sorry, but what you’re saying is nonsense—at least regarding negative pressure and ventilation systems or the DiBt certification.
A certified chimney alone is not enough. This is nowhere stated to show to the “uninformed” chimney sweep. Furthermore, there are plenty of ventilation systems that continue to extract air from rooms if the supply air fails. Or what happens if the door to the combustion chamber is not properly closed by mistake? In that case, the certification is basically worthless.
So please don’t give advice that will later have to be corrected at high cost.