MVHR stands Mechanical Ventilation with Heat Recovery. It is the process of recovering and reusing otherwise wasted heat energy in a property. In domestic settings, heat energy is recovered from the extract air via a highly efficient heat exchanger. This heat is then used to pre-warm the incoming supply air. Once warmed the supply air is filtered and supplied around the property. This can help reduce heating bills and improve the energy efficiency of a property. Airflow produces a wide range of whole house domestic MVHR systems. Airflow produces a wide range of whole house domestic MVHR systems. There is a unit to meet every circumstance and many have an A ErP Energy Rating and at least 90% energy recovery.