It seems like the best place to install the 12,000 BTU air conditioner in our house is in a window in the living room. On the other side of that window is an enclosed porch, approx 27x7 feet. Because the windows jut out into the room, there would be about 4-5 feet between the end of the AC and a window. Here's a diagram of the house. The porch is the lower part and the red is where the AC will go
The online consensus seems to be that installing a window AC between two rooms like this is bad news but I'm wondering if it might be more useful in this situation since the porch has some airflow and the unit would be relatively close to a window. I have two main concerns: airflow and drainage.
Drainage seems relatively easy, as I could hook a hose up to the bottom of the unit and run the water right out a window.
Airflow seems the larger issue. Even though it's almost entirely windows, would the porch heat up so fast that it would ruin efficiency (and maybe the AC unit condenser)? And if that's the case, could I try to run a duct from the back of the AC to the window about four feet away? Would that make it feasible or should I just find another window?
Your thoughts? Thank you!