A CMV or controlled mechanical ventilation is an aeraulic system installed within a building. Its main function is to renew the air in a building.
It consists mainly of :
● A casing which contains 1 fan motor, 2 if it is a double flow CMV)
● An aeraulic network of extraction (ducts + mouths)
● Air inlets on the joineries of the living rooms or an aeraulic network of insufflation if it is about a double flow CMV
The operating principle of the VMC is explained as follows. The ventilation network of the CMV is equipped with inlets and outlets to manage the incoming and outgoing airflow.
● The exhaust vent draws stale air from the kitchen, pantry, laundry room, bathroom, and toilet to the outside.
● The new air makes its way through the air inlets at the level of the joineries to enter the living rooms and clean the interior atmosphere. If it is a double flow CMV, the new air does not go through the openings at the level of the joinery but by ducts and air inlets.
● A static/passive exchanger (classic double flow) or an active exchanger (thermodynamic double flow) between the incoming and outgoing flow allows to keep a large part of the calories (classic DF) or even to produce hot and cold air (thermodynamic DF)
The more insulated and airtight the building, the more necessary it is to have a ventilation system capable of removing pollutants from the building.
Indoor air pollutants are of 3 types:
– The CO2 that we release through our breath, if present in too large a quantity, causes problems of concentration and sleep.
– The water vapor, H2O, that we reject by breathing but also by the showers, the cooking vapors, the washing machine and dryer, is responsible for the degradation of the building and favors the proliferation and the development of bacteria inside the premises.
– Volatile organic compounds, VOCs, are present in large quantities in household products, furniture, detergents, tobacco, etc. They are carcinogenic for our body
It is therefore essential, and all the more so in a recent building, to expel these pollutants to the outside in an optimal and mechanical manner.
The MyDATEC systems renew the indoor air more than conventional systems and control, thanks to sensors, the thresholds that should not be exceeded in the home. If the threshold is crossed, then the machine “over-ventilates”.
Ideally designed to improve your indoor comfort, the MyDATEC CMV solution combines a number of advantages.
● A system capable of adapting to different types and sizes of buildings
With a coverage capacity of approximately 250 m2, the MyDATEC system can renew the air in a home and can be expanded to meet the ventilation needs of a larger area. Our solutions are particularly appreciated in homes, medical practices, day care centers, schools and professional offices. MyDATEC is involved in the new and renovation of buildings.
In order to treat a larger building, we multiply the VMC systems. This allows us to treat buildings in several control zones.
● An autonomous system and a simple and intuitive control
The system regulates itself according to the user’s desired temperature. These settings will allow the system to automatically change modes (heating, ventilation, over-ventilation, dehumidification, free cooling or active cooling).
Thresholds for pollutants (VOCs) and humidity not to be exceeded can also be specified to the system. In addition, a fine programming can be configured to modulate the temperature requirements in the building according to 8 daily time slots and differentiate between weekdays and weekends.
● In addition to ensuring healthy air in the building, the production of hot and cold air is clever and very energy-efficient.
By recovering the energy from the stale air just before it is exhausted from the home, our system is able to :
o Increase the temperature of the fresh air flow entering the dwelling, about +27°C in heating mode (winter and mid-season).
If 0°C outside, at the start of the machine the supply air to the living rooms (living room, bedrooms) will be 27°C
If 10°C outside, the air blown in will be 37°C (excluding electrical resistances)
o Lower the temperature of the fresh air flow entering the dwelling, about -17°C in cooling mode (summer).
If 37°C outside, the supply air will be about 20°C.
To ensure this energy production, the system consumes the equivalent of a domestic refrigerator + freezer (with a consumption between 500W and 800W) depending on the models of VMC and the sizes of the projects to be equipped).
● A ready-to-install kit and easy installation
MyDATEC provides an assembly guide for the parts that make up your thermodynamic CMV.
It provides you with the guidelines to connect all the equipment, from the air components to the various connections.
MyDATEC makes an explanatory diagram on the plans of your project in order to facilitate the installation of all the components of the “aeraulic kit”. This set is made up of ducts, distribution boxes, control units, extraction and insufflation outlets, roof or wall outlets, clamps and other installation accessories.
If necessary, a MyDATEC-approved installer can come to the site to install the device and put it into operation.
● The disadvantage of the thermodynamic double flow ventilation system
The only disadvantage of this system is its higher acquisition cost than the standard single and double flow ventilation systems on the market. However, its value is measured by its energy efficiency, its robustness and its versatility which satisfy the needs of our users in all seasons
Let’s make a comparison between the different types of single flow, double flow and thermodynamic double flow CMV.