Answer by  
                                                                                          bmathews (11)
                                                            
                          
                          
                                                          You need to determine the load of the room.  Mini-splits are made in a variety of sizes ranging from 1 -5 tons.  You can determine what you need by doing a manual J calculation.  It will take into account amount of insulation, how many windows and their sizes, the direction they face.