The Samsung ducted air conditoiner had multiple problems where repairs would outweigh the replacement cost. We opted for a Panasonic unit as roof space was limited and even though it is 20kw, the indoor unit is quite compact in size. Installed also was the Advantage Air Ezone control system which allows full wifi control via smartphone and percentage control of airflow per zone. You can control your air conditioner with this product from anywhere in the world with ease.