ᐅ Location of heat pump – ventilation duct closed window

Hello everyone,

The heat pump has been purchased (thanks for the great advice here!) and I have now received the details about the safety zone. I’m currently considering the installation location.

The ideal spot is near a ventilation grille with a basement window to the boiler room. If I remove the window handle, the installer would be willing to install it there. Ventilation shouldn’t be much of an issue (basements are rarely ventilated anyway, and if needed, ventilation can be done through the door to the garage).

However, I still have concerns about whether the refrigerant might still penetrate inside in case of a leak (the window is 22 years old, and possibly not very airtight). In front of the window, there is a drainage channel. If I cut it at a height so that the opening is below the window, then the gas should seep downwards in case of a leak and not enter the house, right?

Picture of my desired installation location:




Picture of ventilation shaft / drainage:

[IMG width="181px"]https://i.postimg.cc/kBTJdKMH/20250308-083458.jpg[/IMG]

Looking forward to your feedback.

Good luck

Our factory service refused to start up the heating because a light well was located 80cm (31.5 inches) away. A pane of glass needs to be installed (which still hasn’t been done). Simply unscrewing the handle wasn’t enough for them. It’s really frustrating to have to fix something like this afterwards, so it’s good that you’re thinking about it now. We had the general contractor responsible here, and they didn’t show much foresight in this regard.

If the shaft is supposed to be used for ventilation, then the heat pump cannot be placed there. Otherwise, you can put a Plexiglas cover on top and seal it properly. What type of refrigerant does the heat pump use?

Thank you very much for your help. Oh man, then it will be the plexiglass option.
Silly question: I’m planning to order it custom-sized online and then choose 0.5cm (0.2 inches) less on each side than the measured size (to allow for the sealing compound).

Is that okay, or do I need to consider anything else?

The hole in the wall for the dryer (which I don’t actually have) would also need to be sealed.

The refrigerant is R290.

Newbi23 schrieb:


The hole in the wall for the clothes dryer (which I don’t actually have) would also need to be sealed.

You don’t need to seal that because the refrigerant gas wants to go downwards. The refrigerant is lighter than air. I would install a ventilator there if you want to remove the moist air from drying clothes.

I'll just be a bit persistent – I wouldn’t place it in front of the shaft; there are plenty of exterior walls where it can go...