Congratulations! You have an air-conditioner now. We can give some advice before you start a happier life. The length of the pipe (vertical and horizontal) should be short or should be kept as it was installed. Isolation should be done carefully in connection parts. The space between the window and the air-conditioner in window-mounted air-conditioners should be isolated well. And also, the air-conditioner should be mounted on the most proper place in your house. The plug socket shouldn’t be used for other devices except the air-conditioner. Installation and controls of the air-conditioner should be done by an expert or a technician. Also, external unit of the air-conditioner, which is installed out of the house, shouldn’t be exposed to natural effects. This installation influences your cost bills and the air-conditioner’s long-term usage.