Balancing ventilation system, reducing noise from HVAC equipments or ensuring uniform air diffusion.
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Neighboring noise, 2006-1099 decree of 31 august 2006
This decree describes the regulations that commercial buildings’ equipments are subject to when they are near an inhabited area. The maximum values for emerging sounds are 5dBA by day and 3dBA by night to which is added a corrective in db(A) that depends on the cumulated span of apparition.
Noise on the work place:
These decrees set the minimum security and health prescription regarding workers exposures to loud noises.
|Daily noise exposure||Peak point|
|Level of application||European||French||European||French|
|Standard||2003/10/CE Directive||2006-892 decree
of 19 july 2006
|2003/10/CE Directive||2006-892 decree
of 19 july 2006
|Exposure limit values||87 dB(A)||87 dB(A)||200 Pa||140 dB(C)|
|Superior exposure values inducing measures||85 dB(A)||85 dB(A)||140 Pa||137 dB(C)|
|Inferior exposure values inducing measures||80 dB(A)||80 dB(A)||112 Pa||135 dB(C)|
2006-892 decree of 19 July 2006
Acoustic regulation in schools imposed by the NRA, concerning construction license dated after 1st January 1996.
Acoustic pressure levels generated by the building’s equipments that cannot be exceeded in premises:
|Libraries, Information and documentation centers, medical premises, rest rooms||33 dB (A)||38 dB (A)|
|Teaching premises, musical classrooms ; calm workshops, administration, dining room, general-purpose room||38 dB (A)||43 dB (A)|
Insulation to equipments’ noises
For equipments’ noises, the required performances correspond to the maximum noise level that must not be exceeded in a reception premises (standardized acoustic pressure level):
- Ventilation equipments (Set up at minimum airflow ) : 30 dB(A)
- Sound proofing to outside noises: the front walls must attenuate outdoor noises by at least 30 db(A)
It describes the French objectives regarding the environment, by establishing energetic efficiency standards for buildings, through the integration of new ventilation systems, a valuation of the certification, an assessment of the energy consumption and a control of the quality of the installations.
Air flow regulation
Article 64.1 of the department sanitary regulation
in m3/h per occupant (air at 2kg/m²)
|Fresh air flow|
|Premises banning smoking|
|Teaching premises : classes, study rooms, laboratories (with the exception of those with specific pollution), kindergarten, primary schools and middle schools||15|
|Accomodation facilities, collective rooms (or less than 3 people) dormitory, cells, restrooms||18|
|Meeting premises, such as meeting rooms, performances halls, cultural rooms, homes||18|
|Selling premises such as shops and supermarkets||22|
|Dining premises such as cafés, bars, restaurants, school dining halls,dining rooms||22|
|Premises used for sports :|
|Per sportsman in a poolsportif dans une piscine||22|
|Per sportsman in other premises||25|
Art.64 of the sanitary department regulation
For premises where human presence is episodic (deposit, archives, circulations, entry halls…) and for premises where the layout doesn’t enables to be ventilated through adjacent premises, the nominal fresh airflow to induce is 0.1 liter per seconds and per m² or 0.36m3h/local
NF EN 13779 July 2007
This standard applies to the making of ventilation and air conditioning systems for non residential buildings subject to human occupation, except for applications such as industrial process. It also describes the minimum airflow in sanitary ventilation set at 18m3/h.
14th February 2000 decree Article 28
It specifies the setting places for different types of ventilation (comfort or air exhaust) as well as the location of the fresh air intakes.
Technical instruction 246, modified by the 22 March 2004 decree concerning smoke exhaust processes in public rooms
It states that in a public room, stairways and common circulation areas must be cleared of smoke first and foremost.
Fully expanding since the 50’s, the commercial market has little by little overtaken the agricultural and industrial markets. Nowadays France is ranked second worldwide regarding service exportation. The commercial market includes offices, hotels, business, public rooms and professional kitchens.
Common issues and constraints
In a commercial building, two of the major issues are the evacuation of users and an easy access to firemen in the event of fire.
Energetic efficiency is measured through the criteria of the RT 2012, UBat or the HQE standards. It sets the energetic threshold of low consumption buildings, thus limiting the heating, cooling, ventilation and lighting costs.
It is necessary to compromise between hygiene and comfort in order to respect the legal rate of air renewal without bothering the occupants of the room.
In order to ensure proper working conditions to the people who are in the premises all day long, it is important that the noise level generated by the functioning of neighboring machines doesn’t bother them.
Several application areas
An office ventilation mainly answers issues of:
- Energetic costs
The notions of thermal comfort and architectural integration are part of the selling process.
Public rooms are specifically regulated buildings for which fire safety is the main issue.
The main issue with kitchens comes from hygiene, hygro-thermal comfort and acoustic control.
There are many sanitary ventilation strategies depending on the size of premises, their exposure to pollutant and the number of people working in it. We can distinguish 3 kind of ventilations : natural, double flow and adjustable airflow.
Smoke exhaust processes follow the same setting regardless of the commercial building: low fresh air intake sometimes coupled with an extraction.
The RT 2012 brought innovations regarding energy consumption reductions, such as the heat exchanger or the reduction of pressure loss induced by the ventilation equipments.
Acoustic solutions are set in accordance with the kind of noise emitted, be it related to environment, dimension or equipment.
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