The Vent-Axia Sentinel Kinetic 200ZH, Mechanical Ventilation / Heat Recovery (MVHR) is a heat recovery unit designed for the energy efficient ventilation of houses and similar dwellings, conforming to the latest requirements of the Building Regulations document F. The Lo-Carbon Sentinel Kinetic models have two fully adjustable speeds and a purge setting. Unit is supplied with a digital controller that can be used to pre-set airflow speeds as required. Night time set back. Up to 81% Heat Recovery