Ventilation settings good? - Electricity consumption quite high

Hello, I have taken a closer look at the settings of our Vallox 350 MV system.

First, I raised the supply air temperature from 15 to 20 degrees. Vallox states a value of 15 degrees as optimal in the description. Why is that? Does the air otherwise have to be electrically reheated if this value is not reached?
In the system settings, the supply air temperature was also set to 15 degrees. According to the pictures, however, the supply air was at 20 degrees. Something is not right there.

In addition, I raised the RH limit for humidity from 48 to 55. The air was quite dry, see the graphic.

I reduced the CO2 value to 900.

I reduced the fan power from 40 to 35. The system became noticeably quieter, which surprised me given the small difference.

What do you think about the other settings according to the pictures?

Since the power consumption of the system seems very high to me, the settings should also lead to savings. Of course without losing the purpose of the system.

: what's there to like about this questionnaire? :oops: Great screenshots or great questions asked? :D

: what's there to like about this questionnaire? :oops: Great screenshots or great questions asked? :D

I find the question interesting, even though I can't answer it, and I look forward to the responses from forum members who are familiar with it. Besides, I think a "Like" is a friendly welcome and means "Nice to have you here." :-)

You have now changed some target values and hope to have invented the "magic pentagon." I do not know your system, but the changes are partly contradictory. Do not think that it works the way you imagine.

Why is that so? Does the air otherwise have to be electrically heated further if the value is not reached? The system settings also showed 15 degrees as the supply air temperature. According to the pictures, however, the supply air was at 20 degrees. Something is not right there.

Here I give you 's standard tip, if he does not want to ;)

Condition manual!

Does the air have to be electrically further heated if the value is not reached?

Yes, that is the case.

Vallox has specified a value of 15 degrees as optimal in the description. Why is that?

Because then no electrical reheating is necessary and the air is reheated by the existing heating system, which is more efficient and more cost-effective.

According to the pictures, however, the supply air was at 20 degrees. Something is not right there.

Yes, because your heat recovery works and the air is warmed up as a result. The 15°C is to be considered as a limit value at lower outside temperatures than is currently the case.

Because the power consumption of the system seems very high to me,

How is it measured and over which periods?