Encore Mechanical, LLC is an HVAC contractor that performs mechanical contracts in new construction and renovations projects designed around variable refrigerant flow (VRF) equipment. Our home base in North Texas and our commitment to quality processes allows us to execute work across the US. Variable Refrigerant Flow, or VRF technology, is equipment that routes 2 and 3-pipe refrigerant circuits from one outdoor unit to multiple indoor units (or zones) and is capable of providing heating and cooling at the same time as different zones require.