Is the "storage time in case of malfunction" 25h or 9h?
On various sales pages, including Digitec/Galaxus, I find 25h. But the data sheet says 9h. Which would be less than the Medion part from Aldi.
Are there any additional factors to consider, such as the cold batteries?
Which one is correct?

And 2nd question: How loud is the device in normal operation? That is, subjectively described. I know that it is listed with a maximum of 39dB.

Question

Is the "storage time in case of malfunction" 25h or 9h?
On various sales pages, including Digitec/Galaxus, I find 25h. But the data sheet says 9h. Which would be less than the Medion part from Aldi.
Are there any additional factors to consider, such as the cold batteries? 
Which one is correct?

And 2nd question: How loud is the device in normal operation? That is, subjectively described. I know that it is listed with a maximum of 39dB.

Accepted Answer

I cannot give any information about the storage time in the event of a malfunction, as we have only been using the unit for 1 week. The volume is not enormous. There is a slight humming noise, but it is hardly disturbing. However, we have the unit in the basement.

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