ᐅ Controlled residential ventilation – filters installed directly in exhaust vents

Hello everyone,

I have a question: do you have filter bags installed directly in your exhaust vents to catch dirt right there? According to DIN standards, this is apparently required for the kitchen.

I once installed filters in all the exhaust vents, and after about 3 months the filters were so dirty that hardly any air was being extracted anymore. Seeing this, I wonder how the exhaust ducts look after several years without filters directly in the vents.

Simply installing them is not an option either, since the values would no longer be correct because the filters cause a pressure loss.

I would like to know if you have installed any filters or not, and what your installer told you about this.

I insisted on having filters installed. Everything else, in my opinion, is completely ineffective. I would rather replace the filters every 2-4 months than have all the dirt circulating in the system.

Filters need to be installed, vacuumed every 3 months, and replaced once a year.
Was that after 3 months, maybe still during the construction phase?
For us, after 3 months there's just a little dust on them, which I vacuum off quickly, but dirty?

Ok, thanks for your feedback. However, I think most people don’t even know that something like this exists.
It just reinforces my decision to place them again in the exhaust air stream.

Well, the runtime was a little over 3 months. I should simply check them at the same intervals as the other filters.
For example, in the bathroom, the filter was so clogged that only 20 m³ (706 cubic feet) of air was extracted instead of 55 m³ (1943 cubic feet) before.

How did you measure that?

With a ventilation measuring device. One should not underestimate the impact of installing these filters afterwards, as they cause pressure loss. Ideally, they should be installed before any measurement or balancing is done.