Couple of things to note.....the manual is lacking in giving direction to change the language the controller speaks (default is Chinese), and the use of the buttons to get to different programming modes. It also is unclear if the particular unit is capable of wi-fi connection (had to Google to find out my unit is not....would have to change out the controller). Also, keep in mind the exhaust pipe should be parallel, or pointed downward, to the ground or floor in order to let any condensation (during cold weather) drain out, otherwise it will freeze and the unit will not start due to error messages because of a blocked exhaust.