The definition of a VRF System in commercial buildings is a variable refrigerant flow system. It is an advanced air conditioning system that has been developed to meet the needs of commercial buildings. The system is designed to provide superior energy efficiency, optimal performance and flexible zoning options. It works by having multiple indoor air handlers connected to an outside compressor. The compressor is able to adjust the refrigerant flow, depending on the cooling needs of the building. The VRF System also allows for multiple cooling zones in the building, allowing for better control over temperatures in different areas of the building. The system is also very efficient, as it is able to reduce the amount of energy used compared to a traditional HVAC system. The VRF system is also able to reduce noise levels, as the compressor is typically located outside of the building. It is also able to reduce installation costs compared to traditional systems, as it requires fewer components and a smaller space to install. Overall, the VRF System is a great solution