ᐅ Question about daily living with a mechanical ventilation system with heat recovery

Sebastian79 schrieb:
I just assume he meant a chimney – a mechanical ventilation system does not replace a chimney due to the low air exchange rates. Additionally, greasy cooking fumes are harmful to the ducts.

That's correct!

In combination with a controlled residential ventilation system, a recirculating hood in the kitchen is recommended (not an exhaust hood). Optionally, an additional filter can be installed in front of the extraction opening in the cooking area.

Regarding the pressure changes when opening a window, I will report back in six months, if I don't forget ... hopefully with my own practical experience. I'm Not convinced, to use Joschka’s words ...

Mycraft schrieb:

I have CO₂ sensors placed at strategic points and also one directly in the system. This way, the system is continuously adjusted up or down based on the sensor readings.

Hello,

What would you consider strategic points? For example, we have a party room of about 30 m² (323 ft²), so I could imagine installing sensors there. On the other hand, since events might only happen once or twice a year, it might be sufficient to manually increase the system output during those times and skip using such a sensor, right?

Best regards

Kitchen, bathrooms, bedrooms.

For occasional events like a party, you can of course manually increase the output.

Installing a sensor just for that would be like using a sledgehammer to crack a nut.

Sebastian79 schrieb:

As long as there is no individual volume flow control, balancing the system is never 100% accurate – most companies just go through the house once, use an anemometer, and that’s it...

Very old thread, but apart from "anemometer," there are mostly Proxon topics anyway.

The above statement that the heating engineer adjusts the volume flows is, in my experience, wishful thinking. All installations I know of were done "strictly according to manufacturer instructions." Unfortunately, that means: leave the planning as is, buy the parts, connect everything, plug in, next job.

I have some issues with the shortest supply air ducts, for example, in the bedroom with the "wind" and flow noise, while hardly anything reaches the basement. I once tried to improve this somewhat using those foam silencers in the valve. However, I want to address the root cause and roughly adjust the volume flows at the distribution box to the target values.

For this, I got the Zehnder Comfoset airflow restrictors and now need to measure the air volumes to make meaningful corrections. I’ll probably have to borrow an anemometer for a few days to do that.

Question: Has anyone done this already and can give me advice, or is buying the measuring device a waste of money? Feeling the airflow is not really my strong point.

OWLer schrieb:

I got the Zehnder Comfoset airflow restrictors for this and the next step would be to check the airflow rates in order to make meaningful adjustments. I’ll probably need to borrow an anemometer for a few days to do this.

We have two Comfort Air units (duplex house). For us, there were no noise issues. In the other apartment, the system was set too high as well. There is a maintenance menu where the airflow can be reduced via software. The airflow restrictors didn’t really make much difference.