Problems with INDOOR air

What is the cause?

Air inside buildings has a significantly higher level of pollution than outdoor air.


Moisture and mould

Bacteria and viruses


Cigarette smoking

Cooking odours

  • Mechanical Ventilation

    All human activity, at home, at work, at school, and in places where we spend most of our time, produces pollution. VMC reduces indoor air pollution by continuously renewing indoor air.

    Mechanical Ventilation (VMC) replaces dirty and damp indoor air with clean air rich in oxygen.

VMC system

Heat recovery unit

The heart of the VMC system

The heart of the VMC system is the heat recovery unit used to extract air inside places more susceptible to higher levels of pollution (bathrooms, kitchens and laundries) and at the same time introduce fresh air taken from outside.

The heat recovery unit's heat exchanger crosses the two air streams, recovering energy for heating (in winter) and cooling incoming air (in summer).

  • How does the
    VMC system work?

    The heat recovery unit is connected to the outside via two ducts, one for intake of clean air and one for expulsion of polluted air.

    Air distribution inside buildings is constructed on a case-by-case basis, using flexible ducts with a small diameter in order to reach different rooms within a building. Grilles or air vents are installed in every room, in ceilings or walls, enabling the transit of the air intake or expulsion.

    Depending on the complexity of the system and the number of distribution ducts, the system may be equipped with a connection box to facilitate its installation, even in complex environments

VMC system

Is it a cost or an investment?

The VMC system is really very simple and typically has:

A long duration

Low power consumption

Cheap maintenance

  • The VMC’s cost is recuperated from the energy savings made by using air exchange and without opening doors and windows.

    In the winter, the temperature difference between indoor and outdoor air can reach over 20°C and daily air exchange involves a significant heating cost. A similar situation occurs in the summer when the outdoor temperature can exceed room temperature by 10°C.

    Continuous air exchange breaks down contaminants without causing heat loss and can improve the indoor air quality where you live. The VMC system can improve a building’s energy efficiency class, thus adding to its commercial value.

Considering that the initial fee for the installation of the VMC can be recuperated over time by the savings made on heating and cooling costs, and considering that the commercial value of the property will increase, it can be concluded that the VMC system is not a cost but an OPTIMUM INVESTMENT, in purely economic terms as well as for health and well-being.

How to set up a

VMC system

The VMC system is simple to install, even in buildings already inhabited.

The simplest solution for installing the recovery unit and distribution ducts is to create a space in the ceiling using panelling or plasterboard.

Composition of the system

Heat recovery unit

Pipes connecting to the outside and vents

Outdoor grills


Distribution boxes

Air dampers

Grills and vents with plenum