We had an a/c system put in our basement to supply the first floor a few years ago (and there's another system in the attic for the 2nd floor). This one in the basement is vertical, with the incoming air coming up from the bottom of the unit, cooled then goes out to the ducts from the top. I've noticed when changing the filter (at the bottom of the unit, just above the incoming ductwork), that it's got water on it - condensation from the coil above it I guess). Certainly not much. THe system does have a drain line that IS working and there IS water flowing out to the sump pump. I would think most all of the condensate is being collected. just a little bit drips on the filter. 2 teaspoons type of quantity. Any thoughts on 1) the units aren't really supposed to be mounted vertically? 2) ok for vertical, but water is unavoidable? 3) ok for vertical and do this to get those last bits of water into the condensate tray / piping? THANKS!

Im working on a way to make my dumb split a/c unit smart. I need to be able to communicate with the Smart Home hub when the a/c is on and when it is off. I am thinking of placing a window sensor on one of the vents. When the a/c unit turns on, the a/c vent opens and the window sensor detects it has been opened, and that tells the Smart Home hub the a/c unit is on. When it turns off, the vent closes, the window sensor detects it has been closed and tells the hub the a/c unit is off. My question is, is there any harm with placing the window sensor on the a/c vent? The sensor I will be using weighs 0.64 ounces, so the part that will be on the vent will weigh less than that.