Most air conditioning units will need yearly maintenance. This will involve a full service and cleaning of filters. In very dusty areas units may need more frequent maintenance. Regular servicing will extend the life of an air conditioning unit. Keep a record of when this is done so you know when to contact someone!
Dunbeath
Dunbeath is a town in south-east Caithness, Scotland on the A9 road. It was the native home of Neil M. Gunn (1891-1973), author of The Silver Darlings, Highland River and so on, most of whose novels are embeded in Dunbeath as well as its Strath. Dunbeath has a very rich archaeological landscape, the site of countless Iron Age brochs as well as an early medieval reclusive site (see Alex Morrison's archaeological survey, "Dunbeath: A Cultural Landscape".) Of Dunbeath's landscape, Gunn created: "These small straths, like the Strath of Dunbeath, have this intimate charm. In boyhood we learn more about every square lawn of it. We encompass it physically as well as our memories hold it. Birches, hazel trees for nutting, pools with trout and also a sometimes visible salmon, river-flats with the wind on the bracken as well as going away bunny scuts, a wealth of wild blossom as well as small bird life, the skyrocketing hawk, the unexpected roe, the old graveyard, thoughts of the folk who as soon as lived far inland in straths and also hollows, the past and also today held in a minute of day-dream." ('My Bit of Britain', 1941.). There is a community museum/landscape interpretation centre at the old village college.