Nice box setup, Mike.
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If you are going to have a hole in the wall can't rain get on to it? Or is there something more I don't understand?Here's the hostel: (Click
here for the max size picture.)

The new camera is supposed to go just under the eaves. Doug thought it would go above the vent, but I can see in the picture, there won't be enough room. I can make the hole to the side of the vent. But the roof overhang will protect the camera opening from rain.
By the way, I believe the current web cam is in the left side window -- note the cardboard and the object at the bottom.