The Slim Ducted unit is a very compact with low height dimensions for flexible ceiling installations. High Efficiency Twin Rotary Inverter Compressor. Replacement Technology (R22 & R407c) Slim 210mm deep ducted unit design Static pressure up to 45Pa Extremely quiet operation Twin split also available Infra-red and wired controls available Operational to –15ºC in cooling and heating The Slim Ducted unit is a very compact with low height dimensions for flexible ceiling installations. The unit is suitable for use with either new R410A refrigerant pipework, or indeed can be used as ‘replacement technology’ enabling the re-use of existing R22 or R407c pipework. Key features include high energy efficiency performances in cooling and heating and a choice of two selections for the air inlet section: bottom or back.