I want to give them the benefit of the doubt and say perhaps it’s a deep freezer that is only opened occasionally, and I guess is pretty well sealed as long as it’s closed.
The kitchen appears to have one of those built-in fridges that matches the cabinets:
My family/me (in and around berlin):
Me: WM in the kitchen
Parents: WM in the bathroom
Brother: WM in a little nook on the corridor(? Flurnische)
Another Brother: WM in the basement (benefits of a house)