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De l’air frais dans chaque classe, mesuré.

Les salles de classe bondées deviennent vite étouffantes : le dioxyde de carbone monte, l’attention baisse et les infections se propagent plus facilement. Des capteurs dans chaque salle indiquent quand ouvrir les fenêtres ou lancer la ventilation, aident les équipes techniques à corriger les salles jamais renouvelées et donnent aux écoles la preuve de l’air que respirent leurs élèves.

Industrie

Éducation

Mesures

4

Sources citées

4

1. Éducation · Air et ventilation des salles de classe

   Stuffy rooms, tired students

   Crowded classrooms get stuffy fast. Carbon dioxide rises, attention falls and infections spread more easily, and many ventilation systems do not work as designed. Parents increasingly ask about the air their children breathe, and schools have little evidence to answer with.

2. Ce qui est mesuré

   Every room’s air

   A sensor at breathing height in every classroom measures carbon dioxide, temperature, humidity and particles, and an outdoor sensor measures the particles that come in when windows open, so each room has its own record. Every instrument keeps its calibration and position with the site record.

   Instruments

   Room air sensors · Outdoor particle sensor

3. Le nœud de base

   A simple signal

   The node turns each room’s readings into a simple signal for teachers, computes ventilation performance from how fast carbon dioxide falls after lessons, flags rooms that never clear and advises when outdoor pollution means windows should stay shut. Every value is signed at the node before it leaves.

4. Radio et liaisons

   No cables in classrooms

   Room sensors reach one gateway per school over a low-power link, with no cabling and years of battery life. The node joins the school network to reach facility teams, dashboards and, where they exist, ventilation controls. When one path fails, the other carries the data.

   Liaisons

   LoRaWAN · Wi-Fi

5. Comment ça marche

   From a stuffy room to a fixed fan

   A science room shows carbon dioxide climbing in every lesson and never clearing between them. The node flags it; facilities find a failed ventilation fan and replace it. The next week the room clears between lessons and teachers see the signal turn green.

6. De la commande à l’exploitation · Commande

   Scope with the facilities team

   The scope reads the district’s schools, room counts, ventilation types and complaints. Nexus Observatory Inc. returns the sensor plan, displays for teachers, facility reports and a price per room and per year. The scope is agreed before any site work begins.

   Planifier un déploiement

7. De la commande à l’exploitation · Relevé

   Survey rooms and systems

   Crews survey representative rooms with facility staff: sensor positions away from windows and doors, ventilation systems and their controls, gateway coverage and network access. Findings shape the kit for each site before anything is built. Every finding is kept with the site record for the crews who follow.

8. De la commande à l’exploitation · Autorisations

   School approval

   The school and district approve installation, and staff and parents are told what is measured and how displays work. No personal data is collected. Every approval is kept with the school record. No crew goes to site before its approvals are in place.

9. De la commande à l’exploitation · Fabrication

   Build and calibrate

   Sensors are calibrated, radios paired, the gateway and node configured with room names and enrolled with their identities. Each kit is labelled by room. Nothing ships until the whole kit has passed its tests together. Test results travel with the kit to the site.

   Ouvrir le configurateur de stations

10. De la commande à l’exploitation · Installation

    Install room by room

    Crews mount sensors at breathing height in every room, fit simple displays for teachers, install the gateway and node and connect to the school network. Every room is recorded. Crews follow the site safety plan throughout the work. The site record is updated before the crew leaves.

11. De la commande à l’exploitation · Mise en service

    Commission over a week

    Chaque nœud prouve son identité. Readings are checked against a reference, ventilation performance is measured in each room through a normal week, and rooms that never clear are reported to facilities. Acceptance is recorded with the owner before handover. Results are signed and kept with the site record.

12. De la commande à l’exploitation · Exploitation

    Ventilate when needed

    Teachers see a simple signal to open windows or boost ventilation; facility teams see rooms that never clear and fix them; parents and inspectors see evidence of good air. Every alert and action is kept on the record. Reports for owners and funders come from the same record.

13. De la commande à l’exploitation · Maintenance

    Keep sensors honest

    Sensors are checked against a reference on the agreed plan, batteries replaced when low, displays maintained and software updated in rings. Annual reports show the air in every room. Maintenance history stays with each site for its whole life. Spares and procedures travel with the crews.

    Réserver des services sur le terrain

14. Produits de données

    For teachers, facilities and parents

    Teachers receive room air signals; facility teams receive ventilation performance reports; parents, inspectors and authorities receive indoor air records; maintenance planners receive the rooms needing repair, each tied to room and time. Every product can be traced back to its readings.

    Voir les produits de données

15. Preuves

    Standards for indoor air

    Indoor parameters follow the European indoor environment standard and the ventilation standard, carbon dioxide is used as an indicator as health guidance recommends, and particles are set against the air quality guidelines. Every reading is kept for each room. The record is kept for as long as the duty lasts.

    Référentiels

    EN 16798-1 · ANSI/ASHRAE Standard 62.1 · Roadmap to improve and ensure good indoor ventilation · WHO global air quality guidelines

16. Ce que vous obtenez

    Détection en tant que service

    Des réseaux d’observation conçus, installés, exploités et entretenus moyennant des frais mensuels : stations météorologiques, hydrométéorologiques, de qualité de l’air, sismiques et environnementales, avec données livrées sous licence. Fourni sous forme de service géré et licence de données, pour agencies, utilities, municipalities, insurers, agribusiness. Scale: Global, multi-site, per-site pricing.

    Parler aux ventes

17. Étape suivante

    Planifier avec nous : air et ventilation des salles de classe

    Tell us the site, the measurements and the rules it answers to. We reply with a survey proposal, a design and a scope for classroom air and ventilation. An engineer replies with a survey proposal and a scope, and the plan grows from one site to the network you need, at your pace.

    Planifier un déploiementOuvrir le configurateur de stationsOuvrir le Studio

01Le lieu et ses dangers

Où il fonctionne, et ce qui peut mal tourner.

Operating contextIndoor environmental parameters for ventilation, comfort and air quality are set in the European standard and in the ventilation standard used in many countries, and health guidance on indoor ventilation uses carbon dioxide as an indicator. Schools are judged by parents and inspectors on the air in their rooms.

Dangers

• Carbon dioxide building up in crowded rooms
• Rooms too hot or too cold
• Ventilation systems that do not work as designed
• Outdoor pollution entering through open windows
• No evidence when parents ask about air quality

02Ce qu’il faut mesurer

Quoi, où, à quelle fréquence, et selon quelles règles.

Chaque mesure indique où elle est prise, à quelle fréquence, et la norme ou la réglementation publique qui la fonde. Les numéros de la colonne des sources ouvrent la source citée plus bas.

03La pile d’observation

D’un module de base à un réseau.

Les mêmes briques à chaque échelle : des instruments et un nœud de base, un site avec sa radio, une flotte exploitée comme un tout, et un réseau fédéré sur le protocole ouvert.

1. 01

   Unité de base

   A room sensor: carbon dioxide, temperature, humidity and particles on a low-power radio.

   Build a station →
2. 02

   Site

   A school: a sensor in every room, a gateway, a node and the school network.

   Plan a site →
3. 03

   Parc

   Every school of a district on one facilities view.

   Managed offers →
4. 04

   Réseau

   Districts share indoor air records with health and education authorities.

   The open protocol →

• 01Moniteur de qualité de l’air
• 02Station météo compacte
• 03Terminal LPWAN
• 04Passerelle LoRaWAN
• 05Nœud de périphérie (Wedge)

Radio et liaisons

LoRaWAN

Room sensors reach one gateway per school over a low-power link, with no cabling and years of battery life.

Radio et liaisons

Wi-Fi

The node joins the school network to reach facility teams and dashboards.

Edge computeThe node shows each room’s air as a simple signal for teachers, computes ventilation performance from carbon dioxide decay, flags rooms that never clear and links outdoor particles with when to keep windows shut.

PowerRoom sensors run on batteries for years; the gateway and node run from school power.

04Comment ça marche

De l’instrument au produit.

Le parcours d’une observation, niveau par niveau, avec l’interface de chaque liaison et une nomenclature en dessous ; puis comment ce nœud devient un site, une flotte et des réseaux fédérés.

05De la commande à l’exploitation

Chaque étape, du premier appel à un site en service.

La même équipe et le même dossier portent le travail, du cadrage à la maintenance.

1. 01 Order

   Scope with the facilities team

   The scope reads the district’s schools, room counts, ventilation types and complaints. Nexus Observatory Inc. returns the sensor plan, displays for teachers, facility reports and a price per room and per year. The scope is agreed before any site work begins. 1

2. 02 Survey

   Survey rooms and systems

   Crews survey representative rooms with facility staff: sensor positions away from windows and doors, ventilation systems and their controls, gateway coverage and network access. Findings shape the kit for each site before anything is built. Every finding is kept with the site record for the crews who follow. 3

3. 03 Permits

   School approval

   The school and district approve installation, and staff and parents are told what is measured and how displays work. No personal data is collected. Every approval is kept with the school record. No crew goes to site before its approvals are in place.

4. 04 Build

   Build and calibrate

   Sensors are calibrated, radios paired, the gateway and node configured with room names and enrolled with their identities. Each kit is labelled by room. Nothing ships until the whole kit has passed its tests together. Test results travel with the kit to the site.

5. 05 Install

   Install room by room

   Crews mount sensors at breathing height in every room, fit simple displays for teachers, install the gateway and node and connect to the school network. Every room is recorded. Crews follow the site safety plan throughout the work. The site record is updated before the crew leaves.

6. 06 Commission

   Commission over a week

   Chaque nœud prouve son identité. Readings are checked against a reference, ventilation performance is measured in each room through a normal week, and rooms that never clear are reported to facilities. Acceptance is recorded with the owner before handover. Results are signed and kept with the site record. 2

7. 07 Operate

   Ventilate when needed

   Teachers see a simple signal to open windows or boost ventilation; facility teams see rooms that never clear and fix them; parents and inspectors see evidence of good air. Every alert and action is kept on the record. Reports for owners and funders come from the same record. 12

8. 08 Maintain

   Keep sensors honest

   Sensors are checked against a reference on the agreed plan, batteries replaced when low, displays maintained and software updated in rings. Annual reports show the air in every room. Maintenance history stays with each site for its whole life. Spares and procedures travel with the crews.

06Produits de données et intégration

Ce qu’il fournit, à qui, et dans quels systèmes.

Produits de données

• Room air signalsTeachers
• Ventilation performance reportsFacility teams
• Indoor air recordsParents, inspectors and authorities
• Rooms needing repairMaintenance planners

Intégration

• Gestion des bâtimentsRoom readings can drive ventilation controls.
• Facility planningReports feed maintenance and investment plans.
• Parent communicationSummaries are shared through the school’s channels.

Exchanged through BACnet, OGC SensorThings API, MQTT.

07Questions des acheteurs

Avant de cadrer votre projet.

What do teachers have to do?

Open windows or boost ventilation when the signal says so.

Does it record people?

No. It measures the air only.

Can it control ventilation?

Yes, through the building controls where they exist.

Combien de temps durent les piles ?

Years, with alerts when low.

08Ressources

Les sources de cette page.

Normes, réglementations et lignes directrices publiques, citées là où elles s’appliquent. Chacune ne s’applique que dans sa juridiction ou son champ.

1. 1EN 16798-1: Energy performance of buildings, ventilation for buildings, indoor environmental input parametersEuropean Committee for Standardization
2. 2Roadmap to improve and ensure good indoor ventilation in the context of COVID-19World Health Organization · 2021
3. 3ANSI/ASHRAE Standard 62.1: Ventilation and Acceptable Indoor Air QualityASHRAE
4. 4WHO global air quality guidelinesWorld Health Organization · 2021

09Voir aussi

Cas d’usage et solutions.

10Éducation : domaines spécialisés

Les autres domaines de cette industrie.

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