Without damaging the wall, stretch the corrugated pipe to the room with air outlet (usually in the original kitchen). If it is not long enough, it can be connected and punched on the glass door. But this connection is too troublesome. You can make a hole in the wall. Just get through the original air duct directly. Now migrant workers squatting on the roadside can find a hole, but this hole is also more expensive. I'm from 200 yuan.