I don’t have a child learning over seas yet. But I can tell you that’s not the only saftey concern I would have and probably the smallest. If I was this concernd as you are and rightfuly you are. Go in to any hardware homeware store in your area and buy a smoke/carbon dedector for less then twenty dollars. One set of Batteries will get you through atleast one Zman.
I wish you a lot of nachas.