Variable Refrigerant Flow (VRF) is fast emerging as the most popular way to air condition large homes and commercial properties. Single or multiple condensers can be banked together to offer an almost unlimited capacity range. These condensers are able to vary the volume of refrigerant to remote fan coils to enable maximum cooling where it is required. These systems are perfect for large homes with limited ceiling space and commercial properties where different temperatures are required in different areas or where heat loads in area are constantly changing.