GREE floor ceiling R410a on-off units provide a flexible installation choice on the floor or ceiling area without the need of any internal modifications. They come complete with a remote controller, an automatic electric louver guide, and the optional ability to connect with a wired central controller that can control up to 16 units. Further functions available are self diagnosis, increased heating capacity aided by the intelligent defrost sensor, and auto restart function. Finally the unit is equipped with a durable R410a scroll compressor allowing a reliable life span, together with big capacity and low noise operation.