Andrea has described the heat pump. But I think she forgot to mention there is no Aircon in her place that can use. The place was so clean, tidy and in a pretty environment. We enjoyed our stay in this place. We will definitely book when something comes. The only thing was that We struggled with not having the Aircon, especially last night (The weather was 32C) here in CHCH with the hot weather. It was a rough experience for all of us not having Aircon.