If the box is going to be outside, may I suggest that you also install this, especially if you encounter wild temperature swings. This will prevent any seals from being sucked in or blown out.
https://www.amazon.co.uk/napkery-Breathe...211&sr=8-9
There are others, but I have used these on many occasions and it works for me.
Dries
https://www.amazon.co.uk/napkery-Breathe...211&sr=8-9
There are others, but I have used these on many occasions and it works for me.
Dries