Ducted Aircons Fourways Consists Of A Heat Exchanger Located Outside. With Ducts Constructed From Flexible Cylindrical Tubes Hidden From Plain Sight. Located In Ceiling Voids. Also, Commonly Referred To As Channel Aircons Fourways Or Central Aircons Fourways. This Is Most Often Noticed In Massive Or Older Buildings And Is A Preferred System. Ducted Air Conditioners In Ceiling Voids Have The Advantage. Of Delivering Clean Air To Many Rooms Throughout A Building. Pushing Air Through Ducts And Each Room Or Zone Adjusted Independently. Fourways Ducted Air Conditioning Is By Far Cleaner. Quieter And Still The Best Way Of Distributing Clean Air. Throughout A Large Building With Many Rooms. Starting From 24 000 BTU And Ending At 48 000 BTU.