Clean air is a fundamental prerequisite for occupational safety, process stability, and equipment availability. In many industrial and sensitive applications, emissions are generated during machining, cutting, welding, soldering, grinding, or laser cutting—emissions that can harm employees, disrupt processes, and contaminate machinery. These include dust, smoke, aerosols, vapors, gases, and odors. It is therefore crucial not only that air is filtered, but also where and how: as close as possible to the source, tailored to the process, material, and environment.
Why is air filtration in the workplace important in industry and sensitive applications?
In many processes, airborne pollutants enter the work area directly. Without proper capture, they can spread throughout the room and enter the breathing zone of employees. Depending on the substance, particle size, concentration, and duration of exposure, this can increase health risks while simultaneously tightening requirements for occupational safety, risk assessment, and exposure control. Air filtration therefore serves not only to protect employees but also to ensure process stability, maintain a clean work environment, and prevent deposits in equipment, enclosures, and technical components.
What pollutants are generated during laser cutting, welding, soldering, grinding, or transfer processes?
The type of emissions depends on the process and the material being processed. Welding produces fumes and particulate matter; laser cutting typically produces very fine and ultrafine particles, as well as gaseous decomposition products depending on the material. Soldering produces gaseous components in addition to particles. Grinding, dry processing, or transfer operations can release respirable and alveolar dust. In sensitive medical applications, smoke or a plume is additionally generated. Depending on the application, this may contain chemical and biological components. Therefore, the selection of a filtration and extraction solution should always be process-specific. There is no one-size-fits-all solution for all emissions.
Why is capture at the source usually more effective than general ventilation?
Contaminants should be captured wherever possible at the point of origin. This prevents them from spreading throughout the room in the first place and significantly reduces their entry into the breathing zone. It is precisely this principle that occupational safety and technical sources in Europe and the U.S. describe as a key measure for reducing exposure. Local capture at the source is therefore more effective in many applications than simply general ventilation of the room. This is especially true when emissions occur at specific points and continuously. The closer the capture system is to the source, the better the spread in the work environment can be limited.
Why are general ventilation or room air purification alone often insufficient?
General ventilation and supplementary room air measures can be useful. In many applications, however, they are only a supplement and not a substitute for source capture. The reason is simple. If a contaminant is first diluted in the room, it may have already spread throughout the work area beforehand. This is a significant difference, especially in emission-intensive processes. Local capture acts sooner and reduces exposure where it originates.
How does air filtration protect not only employees but also processes and machinery?
Filtered process air not only reduces the burden on employees. It can also help keep work areas cleaner and protect technical components from deposits. Less dust and smoke in the environment often means less cleaning effort. Enclosures, surfaces, and sensitive components can also be better protected this way. This is particularly relevant in integrated systems, in electronics manufacturing, and in sensitive production environments. There, air quality often has a direct impact on stability, cleanliness, and maintenance requirements.
Air filtration protects
These initial insights show why air filtration at TBH is not viewed in isolation, but always takes people, the environment, and machinery into account.
Air filtration
- helps effectively capture emissions at the source,
- protect employees,
- keep work environments clean,
- and maintain stable processes.
What limits and regulations apply to air filtration in the workplace?
The specific legal situation depends on the country, the substance, and the process. Within the EU, Directive 98/24/EC on chemical agents and Directive 2004/37/EC on carcinogenic, mutagenic, or reprotoxic substances, among others, form important foundations. They are implemented at the national level and supplemented by country-specific requirements, guidelines, and limit values.
In Germany, the TRGS and workplace limit values, among others, are relevant. TRGS 900 specifies a general dust limit value of 1.25 mg/m³ for respirable dust and 10 mg/m³ for inhalable dust. TRGS 528 describes requirements for welding operations. These regulations apply nationally in Germany.
When is recirculation possible, and when is exhaust air the better solution?
There is no one-size-fits-all answer to this question. Whether purified air can be recirculated into the room always depends on the specific application. Relevant factors include material properties, potential gas content, the hazard potential, and nationally applicable requirements. The filter configuration, the actual process control, and the required documentation also play an important role.
In some applications, recirculation is technically and regulatory feasible. In other cases, exhaust air is the safer or mandated solution. Therefore, this decision should never be made in isolation. The risk assessment and the applicable national regulations are always decisive.
How do you find the right filter and extraction solution for your specific process?
The right solution is not determined by a filter class alone. The decisive factor is the interplay of application, material, capture conditions, and operational requirements. Important questions include, for example:
- What emissions are generated?
- How fine are the particles?
- Are there additional gaseous components?
- How high must the air flow rate be?
- How can the solution be integrated into the existing process?
In addition, there are requirements regarding maintenance, disposal, noise levels, and installation location. The question of whether a system should be mobile, integrated, modular, or suitable for sensitive environments is also often decisive. A modular design makes particular sense when requirements change or grow. This allows the solution to be better tailored to the specific process and adapted as needed.
For which applications is process-integrated air filtration particularly relevant?
Process-integrated air filtration is particularly relevant wherever emissions are generated directly within the process. This includes, for example, laser fumes, welding fumes, soldering fumes, dry dusts, transfer processes, plastics processing, as well as cleanroom and controlled environment applications.
Capturing emissions at the source also plays a crucial role in sensitive medical or aesthetic applications. In these settings, it is not only about the filtering effect but also about airflow management, integration, and suitability for the specific environment.
In the medical field, a clear classification also applies. TBH systems are not sold there as medical devices, but as accessories for extracting air directly during laser treatment on the patient, without patient contact.
Why should air filtration be incorporated early in the process planning?
The earlier air filtration is incorporated into the process planning, the better the capture, integration, and effectiveness can be tailored to the application. This allows for the sensible planning of airflow, installation space, enclosure, maintenance, filter replacement, noise, and interfaces at an early stage. If extraction is only considered at the end, it often has to adapt to conditions that have already been established. This makes effective capture at the source difficult and can unnecessarily complicate later integration.
Air filtration is therefore not just a matter of occupational safety. It is also a matter of process reliability and technical planning.
Key Takeaway
Air filtration is most effective when it is considered early on, tailored to the specific process, and implemented as close as possible to the source. In this way, it helps protect employees, keep work environments clean, and reliably support processes.
Find the right solution for your process.
Want to know which filter and extraction system is right for your application? Talk to us about your process, your emissions, and your requirements—we’ll help you select the right solution. Simply click the link below or send us an email.