Heat regulations at work: legal obligations and practical solutions

La chaleur en entreprise ne relève plus du simple inconfort. Depuis le 1er juillet 2025, un décret contraint les employeurs à mettre en place des mesures de prévention actives dès les premiers épisodes de chaleur intense. Méconnaissance du texte, inaction ou solution inadaptée : les risques sont réels, humains autant que juridiques. Voici ce que la réglementation impose. Mais aussi, comment y répondre efficacement, même dans les environnements les plus contraignants. Ce que dit la loi depuis juillet 2025 Le décret n° 2025-482 du 27 mai 2025 relatif à la protection des travailleurs contre les risques liés à la chaleur introduit un cadre réglementaire précis, applicable dans toutes les entreprises. Il structure les obligations de l’employeur autour d’un système de vigilance météorologique à quatre niveaux, définis par Météo-France : Vigilance verte : veille saisonnière, sans obligation spécifique déclenchée. Vigilance jaune : pic de chaleur intense sur 1 à 2 jours. L’employeur doit activer ses mesures de prévention. Vigilance orange : période de canicule durable, avec risque sanitaire pour l’ensemble de la population exposée. Dans le BTP, ce seuil ouvre également droit à l’indemnisation des arrêts de travail. Vigilance rouge : canicule extrême, à fort impact sanitaire. Le niveau d’exigence atteint son maximum. Dès la vigilance jaune (soit un simple « pic de chaleur » de deux jours) l’employeur entre dans un régime d’obligations actives. Il ne peut plus se contenter d’ouvrir les fenêtres. Les obligations concrètes de l’employeur Le décret dresse une liste explicite des mesures que l’employeur doit mettre en œuvre lors d’un épisode de chaleur intense. Ces obligations couvrent plusieurs registres. L’aménagement des postes et des lieux de travail Modification de l’agencement pour réduire l’exposition thermique, mise en place de protection solaire sur les surfaces exposées. L’organisation du travail Adaptation des horaires, introduction de pauses, rotation des opérateurs sur les postes les plus exposés. Les moyens techniques de rafraîchissement Le texte cite explicitement les ventilateurs et brumisateurs parmi les équipements attendus. Un rafraîchisseur adiabatique mobile (lien vers article n°3) constitue précisément la réponse technique la plus aboutie à cette obligation. L’accès à l’eau potable fraîche L’employeur doit garantir une quantité suffisante d’eau fraîche à proximité des postes de travail, avec un moyen de maintien au froid. En l’absence d’eau courante, le minimum légal est de 3 litres par jour par travailleur. Sans oublier des équipements de protection individuelle adaptés aux fortes températures. La formation et l’information des équipes Les salariés doivent connaître les conduites à tenir en cas de forte chaleur et savoir utiliser correctement les EPI thermiques. Enfin, et c’est un point souvent négligé, le décret impose d’intégrer le risque de fortes chaleurs dans le Document Unique d’Évaluation des Risques Professionnels (DUERP). L’absence de mise à jour de ce document constitue un manquement documenté, susceptible d’engager la responsabilité de l’employeur en cas d’accident. Les secteurs les plus exposés Tous les secteurs ne se valent pas face à la chaleur. Les environnements qui cumulent chaleur extérieure et production thermique interne concentrent les risques les plus élevés : ateliers de production métallurgique, fonderies, boulangeries industrielles, entrepôts logistiques sous toit métallique, imprimeries, blanchisseries, centres d’appels mal ventilés. Les travailleurs en extérieur (BTP, agriculture, sylviculture) bénéficient en outre de dispositions spécifiques renforcées dans le décret. Un cas particulièrement complexe mérite attention : les environnements classés ATEX (Atmosphères Explosives). Dans ces zones, la chaleur excessive combinée au port d’EPI antistatiques contraignants aggrave considérablement le risque physiologique pour les opérateurs. Or la majorité des solutions de rafraîchissement disponibles sur le marché (ventilateurs industriels standards, climatiseurs mobiles conventionnels) ne sont pas certifiées pour une utilisation en zone explosive. Leur déploiement dans ces espaces est même interdit et dangereux. Votre entreprise doit répondre à la réglementation chaleur avant l’été ? Demandez une étude personnalisée à l’équipe ClimnTech Pourquoi le rafraîchisseur adiabatique répond directement aux obligations légales Le décret cite explicitement les « moyens techniques » de réduction de la chaleur comme obligation de l’employeur. Le rafraîchisseur adiabatique mobile ClimnTech répond point par point à cette exigence. La réponse spécifique aux zones ATEX C’est le point de différenciation le plus important de l’offre ClimnTech face au reste du marché. Dans les zones classées ATEX (pétrochimie, pharmacie, silos céréaliers, traitement de surface, dépôts de produits inflammables) la réglementation chaleur s’applique avec la même force qu’ailleurs. Mais les solutions ordinaires sont inutilisables. Les rafraîchisseurs adiabatiques ClimnTech sont certifiés Zone 1 et Zone 2 (marquage II 2G IIB T4 Gb), conformes aux directives ATEX les plus strictes et à la certification internationale IECEx. Ils constituent à ce jour l’une des rares solutions de rafraîchissement certifiées pour les atmosphères explosives les plus contraignantes. Leur principe naturel renforce même la sécurité : la légère humidification de l’air réduit les tensions d’électricité statique. Cela est un facteur de risque d’explosion directement limité par le fonctionnement même de l’appareil. Pour un responsable HSE en environnement ATEX, c’est la seule réponse qui permette de satisfaire simultanément l’obligation légale de protection contre la chaleur et les exigences de sécurité propres aux zones explosives. Ce qu’il faut retenir La réglementation chaleur au travail n’est plus une recommandation : depuis le 1er juillet 2025, c’est une obligation documentée et opposable. Elle s’active dès la première alerte météorologique jaune et requiert des moyens techniques déployés, une mise à jour du DUERP, et une organisation adaptée. Le rafraîchisseur adiabatique mobile ClimnTech constitue la réponse technique la plus directe à ces obligations : efficace, rapide à déployer, économe en énergie et compatible avec les environnements les plus exigeants, y compris les zones ATEX. Responsable HSE, directeur industriel ou chef d’entreprise : ne laissez pas l’été prendre de vitesse votre mise en conformité. Contactez ClimnTech pour un conseil adapté à votre site

Air Freshener for Events: The Complete Guide (Weddings, Trade Shows, Exhibitions)

A wedding under a big top in July, an art opening in a gallery without air conditioning, a trade show under a glass roof that traps heat all day long: the thermal comfort of guests and staff directly determines the success of an event. However, traditional air conditioning is often not a viable option in these settings. Indeed, it’s often too cumbersome to install, too energy-intensive, too noisy, and too intrusive. The mobile adiabatic air cooler is specifically designed to address these challenges. Here’s everything an event planner needs to know before summer. Why Conventional Air Conditioning Isn’t Suitable for Events A compression-based air conditioner requires a fixed infrastructure: drilling, ductwork, outdoor units, and properly sized electrical connections. In a temporary space (marquee, reception tent, rented exhibition hall, castle hall), this type of installation is neither possible nor economically justifiable for just a few days of service. Added to this is the noise pollution. In fact, a chiller unit or a high-powered portable air conditioner produces constant background noise. This is completely incompatible with speeches, ceremonies, music, or exhibitions. Finally, aesthetics matter. No one wants to see bulky technical equipment taking center stage amid carefully arranged decor. The adiabatic air cooler: the principle that changes everything Adiabatic cooling is based on a natural physical phenomenon known since ancient times: the evaporation of water absorbs heat from the air. In practice, a fan draws in warm air and passes it through a constantly moistened honeycomb media. The air emerges cooled by 7 °C to 12 °C, depending on the ambient humidity. This is achieved without any refrigerant, without a compressor, and with the power consumption of a simple fan. The result: a cool, gentle, and quiet airflow, operational within minutes after plugging into a standard outlet and refilling with water. Events: Real-World Applications Weddings and Receptions in Tents Tents trap heat. The floor heats up, the fabric traps the air, and guests in evening attire quickly become uncomfortable. Two or three strategically positioned adiabatic coolers create immediate comfort zones. We recommend installing them near the tables, by the dance floor, and at the entrance. The unit’s discreet design is a major advantage: at ClimnTech, the equipment is 100% customizable to blend in with the surrounding decor. This is nothing like a standard portable air conditioner, which can ruin a carefully arranged floral display. Trade Shows and Fairs In exhibition halls, body heat combined with lighting and technical equipment can raise the temperature several degrees above outdoor levels. As a result, it’s not uncommon for visitors to cut their visits short. Conclusion: exhibitors lose commercial effectiveness. ClimnTech portable air coolers are positioned at aisle entrances, in exhibitor booths, or along conference areas. They can be installed on any surface without any construction work and can be moved from one booth to another if needs change during the event. Museums, Exhibition Centers, and Heritage Sites These spaces present two specific challenges: protecting the artworks and enhancing the venue’s appeal. A wall-mounted air conditioner or a noisy portable unit undermines both. The ClimnTech adiabatic cooler slightly humidifies the air. This can help prevent the air from becoming too dry in certain spaces. Its sleek design and customizable finishes allow it to blend seamlessly into a museum or heritage setting without disrupting the aesthetics. Our equipment is therefore ideal for the châteaux of the Loire Valley, art galleries, and exhibition centers. Sports Events and Event Villages Covered grandstands, VIP areas under tents, reception zones: temporary summer installations require a solution that can be deployed quickly and is compatible with a construction site power supply or a generator. The low power consumption of the adiabatic air cooler (compatible with temporary electrical setups) makes it an ideally suited solution. Are you organizing an event this summer and looking for a discreet, high-performance cooling solution? Contact the ClimnTech team for personalized advice. Factors to consider before choosing an event air cooler: The volume to be cooled. A unit is sized based on its airflow rate, expressed in m³/h, relative to the volume of the space. A 500 m² tent with a 4-meter ceiling height contains 2,000 m³ of air. It therefore requires several units positioned around the perimeter, directed toward occupied areas. Natural Ventilation of the Venue Adiabatic cooling is most effective in well-ventilated or open spaces. The more the air is renewed, the more pronounced the effect. Tents with raised sides or halls with an open ridge are ideal configurations. Local Humidity Thermal performance depends on the outdoor relative humidity. The drier the air, the more dramatic the temperature drop. In regions with dry summers (Rhône-Alpes, Midi, inland areas), a temperature difference of 10°C to 12°C is regularly achieved. Water Supply: ClimnTech models feature a built-in tank for complete autonomy or can be connected to a standard water supply for automatic refilling via a float valve. Both options cover all event configurations. Customization: The ClimnTech Feature That Makes the Difference This is one of the key factors that sets ClimnTech apart from most manufacturers of industrial coolers: every unit is customizable. Color, finish, and cladding: the units can be adapted to the event’s visual identity, the venue’s decor, or the aesthetic requirements of even the most discerning organizers. A discreet, quiet cooler that blends into the decor: guests feel the cool air without ever seeing the equipment. This is precisely what organizers of high-end weddings, museum directors, and trade show managers are looking for. In summary: what the adiabatic air cooler brings to the events industry First, a temperature reduction of 7 °C to 12 °C in targeted areas; second, installation in just a few minutes without any construction work. Additionally, it offers power consumption compatible with temporary setups, quiet operation, and customizable aesthetics. In short, the adiabatic air cooler has become the standard for all organizers who refuse to choose between comfort and elegance.

Adiabatic cooler vs. traditional air conditioning: which choice for a workshop?

As soon as temperatures rise, the issue of thermal comfort in the workshop comes into play. There are two main types of solutions available: conventional air conditioning, which is well known, and the adiabatic cooler, which is still too often overlooked. However, for the vast majority of industrial environments, the two options are far from equivalent. The experts at ClimnTech explain why. Two technologies, two philosophies Conventional air conditioning relies on a thermodynamic compression cycle. Essentially, a compressor compresses a refrigerant gas, which then expands to absorb heat from the ambient air. This process produces cool air, but it also releases heat outside. As a result, it consumes a lot of electricity and requires a fixed installation involving often extensive HVAC work. The adiabatic cooler, on the other hand, operates on a radically different—and fundamentally simpler—principle. A fan draws in hot outdoor air and forces it through a constantly humidified honeycomb media panel. As the air passes through this panel, it releases its heat to allow the water to evaporate. It emerges naturally cooled. In short: no refrigerant, no compressor, no construction work. Just air and water. A Significant Difference in Energy Consumption This is the most compelling argument in favor of adiabatic cooling: it consumes up to 80 % less electricity than a conventional air conditioner. Whereas an industrial air conditioner requires several kilowatts to operate, an adiabatic cooler uses only the power of a fan motor. So, against the backdrop of a sustained rise in energy costs, these operating savings profoundly change the profitability analysis of a piece of equipment. The initial investment, significantly lower than that of a centralized system, pays for itself quickly. Mobility: a decisive advantage for the workshop Conventional air conditioning requires a fixed installation. It treats a total volume of air, regardless of whether the space is occupied or not. In a workshop with localized workstations, high ceilings, or frequent openings, this approach cools thousands of cubic meters of air… for the comfort of a single operator. ClimnTech adiabatic coolers are mounted on wheeled frames. They can be set up in just a few minutes, without any construction work, and positioned exactly where the operator needs them. Whether changing workstations, reorganizing the workshop, or addressing a one-time need: the solution adapts to the people, not the building. In short, this flexibility makes it an ideal solution for production workshops, logistics warehouses, storage areas, and even open or semi-open spaces. These are all settings where conventional air conditioning is often ineffective or impossible to install. Tangible cooling performance: Adiabatic cooling lowers the ambient temperature by 7 °C to 12 °C, depending on atmospheric conditions. Its performance actually increases as temperatures rise: the hotter and drier the air, the more powerful the evaporation, and the more pronounced the cooling effect. As a point of reference: at temperatures of 29 °C or higher, studies show that an operator’s productivity drops by 18 % and errors increase by 40 %. Bringing the temperature at the workstation down to an acceptable level is not merely a matter of comfort. It is essential for performance and safety. An Unmatched Environmental Footprint Conventional air conditioning uses refrigerants with a significant global warming potential. It also releases heat into the outside environment, contributing to urban heat islands. The adiabatic cooler, on the other hand, emits no polluting gases. In fact, it consumes only very small amounts of water and electricity. It slightly humidifies the air, which (in the case of ATEX-certified ClimnTech equipment) is an additional benefit. This slight humidification reduces static electricity and limits the risk of explosion in classified environments. Are you equipping a workshop, warehouse, or production area? Request a quote from our experts What Conventional Air Conditioning Does Better Objectivity requires us to mention this. Compression-based air conditioning maintains a precisely regulated temperature, regardless of outdoor humidity levels. It is therefore suitable for environments that require strict temperature control. This includes computer rooms, pharmaceutical laboratories, and certain food production lines. It also performs better in completely enclosed and airtight spaces, where it is acceptable to condition a fixed volume and maintain a narrow temperature range. Summary Comparison Table Criterion Adiabatic Cooler Conventional Air Conditioning Energy consumption Very low (−80 %) High Installation No construction required, portable Fixed, construction required Purchase cost Affordable High Maintenance Simple (no compressor) Complex (gas, compressor) Efficiency in open spaces Excellent None or very low Carbon footprint Minimal Significant Precise temperature control No Yes ATEX zone compatibility Yes (certified range) Not standard Which option is right for your workshop? Does your workshop have any of these characteristics: large volumes, doors frequently opened, localized workstations, ATEX requirements, or an operating budget that needs to be kept under control? If so, an adiabatic cooler meets your needs with greater efficiency than conventional air conditioning—and at a much lower total cost. Compression-based air conditioning remains relevant in very specific contexts. For the majority of industrial workshops, warehouses, and production spaces, adiabatic cooling has become the standard. Would you like a solution tailored to your facility? Contact the ClimnTech team for personalized advice