What is a VMC system and where is it needed?

A VMC system is a system for controlled mechanical ventilation, that is, a device designed for continuous air exchange in the home and indoor environments. Deciding to implement a VMC system in the home makes it possible to provide correct air exchange in enclosed rooms in all situations where it is not possible or not convenient to manage it by opening windows. This is an essential condition to promote the escape of pollutants that can cause adverse health effects, ensuring greater comfort and healthiness in homes or offices. Mechanical ventilation is also basic in all modern energy-efficient and highly insulated homes to avoid issues with moisture and mold while better preserving the building and protecting its value.

How does a forced ventilation system work?

A VMC system can be centralised (generally used on new buildings) or decentralised (ideal for retrofitting and managing the microclimate on a room-by-room basis). In any case, the objective is to expel the exhausted air found in indoor environments, introducing new air from outside in its place. The air treatment systems are equipped with high-efficiency filters to purify the external air before it is introduced into the rooms and with a heat exchanger to recover the thermal energy of the exhausted air and transfer it to the incoming air.

The operation of a controlled mechanical ventilation system starts inside the house: the exhausted air, saturated with humidity, carbon dioxide and harmful substances, is sucked in by the system. It enters the heat recovery unit, where it gives up its thermal energy (heat from the heating in winter and coolness from the air conditioner in summer) to new air, taken from outside and filtered before reaching the exchanger.

At this point, the new heated or cooled air is ready to be introduced into the indoor environment, while the stale air is expelled outside where it disperses.