largemouthtrout

I have no idea where you have checked , but call up a few places that do window tinting for cars . some of these guys have their own laser cutters and do graphics all the time .

12,000 btu should be more than enough for 400 square feet . We are using a 5,000 btu to cool roughly the same area ... also in a bedroom window ... its doing a good job with a small fan to blow the cold out of the room . We keep the bedroom doors open . My though .. without seeing your place .. cover up all those ceiling to floor windows with some nice WHITE curtians or blinds to keep the sun out durring the day . 2 hours to cool a room ? thats crazy , something doesn't sound right there .