BOPLA Gehäuse Systeme, Bünde – Deutschland
Air Humidification at BOPLA Gehäuse Systeme
In-room humidification

Air Humidification at BOPLA Gehäuse Systeme

BOPLA Gehäuse Systeme GmbH, headquartered in Bünde, East Westphalia, is a leading supplier of electronic enclosures. As a subsidiary of the Swiss company Phoenix Mecano AG, BOPLA has an international presence and operates additional European production sites in Hungary and Romania. The Bünde site, with 240 employees, specializes in the finishing of enclosures—from machining and system integration to printing. The focus is on customer- and application-specific development and manufacturing, from prototypes to finished end products. System integration includes, among other things, the installation of touch displays and membrane keyboards, subrack assembly, and comprehensive electronics services such as THT and SMD assembly. Customers come from demanding application sectors, such as mechanical and plant engineering, medical technology, and agriculture.

“Our customers are increasingly seeking more complex turnkey solutions for enclosure technology with very specific requirements,” says Thorsten Penassa, Head of BOPLA System Integration, describing the trend of recent years. With the increasing proportion of sensitive electronic components in system integration and the rising complexity of printing processes, the need for a controlled indoor climate became clear at BOPLA. To further optimize quality assurance, the company decided in 2021 to retrofit a in-room air humidification system.

ESD protection

The installation of the air humidification system in the production areas took place in several phases, beginning in the assembly area, followed by digital printing and screen printing. A Condair in-room system with high-pressure nozzles is used, which ensures optimal relative humidity year-round, individually tailored to the requirements of the respective applications. Especially in the assembly area, where printed circuit boards and electronic components are processed, protection against electrostatic discharge (ESD) is a top priority. As a non-conductive material, plastic promotes potential unwanted static charges, which can lead to damage to components and printed circuit boards. Controlled humidity between 40 and 50 percent increases the conductivity of the air and surfaces. This reliably dissipates electrical charges. For Thorsten Penassa, this is indispensable in two respects: “It provides us with additional protection against damage and hidden defects, and at the same time, we can document a comprehensive ESD protection concept for our customers in accordance with international norms and quality standards.” For example, IPC-J-STD-001F (2024) requires documented proof of control over electrostatic discharges at relative humidity levels below 30 percent—a risk that BOPLA systematically minimizes through air humidification.

Digital Printing in the Cleanroom

Digital printing is another key component of enclosure finishing at BOPLA and enables the implementation of individual customer requests, ranging from photorealistic designs to high-quality color gradients. The printing process takes place under cleanroom conditions in accordance with the ISO 6 standard, which ensures a controlled environment for the printing process. “Especially when printing on complex housing geometries and recessed housing surfaces, preventing electrostatic charging plays a crucial role in achieving a uniform print image,” explains Thorsten Penassa. Constant humidity effectively prevents static charging of the ink particles, enabling consistent, flawless print images even on recessed surfaces near the edges. Dust and particles that could lead to warping or an uneven finish are eliminated by the cleanroom conditions. This is particularly relevant for the final finishing with high-quality clear coat layers. Air humidification in digital printing occurs without any additional mineral content from the humidifier water. This allows BOPLA to meet cleanroom requirements in digital printing while simultaneously preventing static charge in the ink pigments. “The flexible expansion options for air humidification and the integrated water treatment were key criteria in choosing the Condair system from the very beginning,” emphasizes Thorsten Penassa.

Precise Air Humidification

The humidification system consists of a total of 13 high-pressure nozzle humidifiers, which spray a microfine mist into the rooms as needed, and an upstream multi-stage water treatment system. With an aerosol size of less than 15 μm, the additional moisture is immediately absorbed by the room air and distributed evenly and uniformly. The humidifiers are automatically activated when the humidity falls below the defined setpoint. Relative humidity is controlled digitally and by zone, allowing the various production areas to be regulated individually and according to specific application requirements. The multi-stage Condair water treatment system of the DRAABE Trepur type is compactly integrated into a mobile technical module and ensures that only germ- and mineral-free water is used. At the heart of the water treatment system is reverse osmosis (image on the left): Here, the water is forced through a semipermeable membrane that retains nearly all dissolved salts and impurities. This process is supplemented by conductivity synthesis, which removes even the last remaining minerals, and UV-C disinfection, which eliminates all germs and bacteria. The result is fully demineralized ultrapure water that does not introduce any additional particles into the air and is ideally suited for micro-fine atomization, even in cleanrooms. At BOPLA, this ultrapure water is used not only for air humidification but also as process water for weathering test equipment, in which enclosures are tested for environmental influences as part of quality control.

Easy to Maintain

Facility management at BOPLA does not have to worry about maintenance: As part of a full-service rental model, the housing specialist receives a fully serviced and cleaned replacement module for the Trepur water treatment system from the manufacturer every six months, which can be reinstalled in just a few simple steps. The full-service maintenance includes inspection of all components, disinfection, and, if necessary, the preventive replacement of wear parts, as well as continuous technical updates. As a result, the air humidification system guarantees safe operation without additional effort for Facility Management and meets the hygiene standards of VDI 6022 Part 6 and the “Optimized Air Humidification” requirements of the German Social Accident Insurance (DGUV). “This full-service offering is excellent. Replacing the mobile water treatment unit is simple and convenient, so the system runs without interruption and doesn’t create any extra work for us,” confirms Björn Elbers from Facility Management.

Image: Thorsten Penassa (center), Head of Bopla System Integration, together with Matthias Tietgen (right) and Patrick Gumnior (left) from Condair

Quality and Health

The use of additional air humidification at BOPLA has yielded positive effects on process stability, product quality, and the work environment. For Thorsten Penassa, controlling humidity has proven to be an effective quality assurance measure that enables standardized processes and reduces scrap: “In the sensitive production areas, we have significantly fewer problems with static electricity, less dust accumulation, and more stable print results in digital printing. And another positive effect: our employees feel better and are less likely to get sick in the winter.” The indoor air in the humidified areas feels fresher and cooler. At the same time, optimal humidity between 40 and 60 percent protects against dry mucous membranes in the throat and nose, respiratory infections, and eye irritation—especially during the winter months. Thus, air humidification at Bopla also contributes to the well-being and health of employees.

Air Humidification at BOPLA Gehäuse Systeme

Information package: In-room humidification

Always the right fit – find out more here!

In-room humidifiers are used specifically where humidity is required. Suitable for every application and room size, ideal for retrofitting, energy-efficient and easy to maintain.

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Condair in action

Projects and references

Asteelflash Hersfeld GmbH, Bad Hersfeld (Germany)

To protect against electrostatic discharge, ensure quality assurance, and protect the health of its employees, Asteelflash uses in-room humidification systems in its printed circuit board assembly.

Hella GmbH & Co. KGaA, Recklinghausen (Germany)

ESD protection, additional cooling and greater employee satisfaction are the key benefits of in-room humidification at the HELLA electronics plant.

Fogra Forschungsinstitut für Medientechnologien e.V., Aschheim (Germany)

In-room humidification ensures controlled humidity in the printing room. This guarantees a standard climate for the reliable testing of identity cards and banknotes.

Robert Koch-Institut, Berlin (Germany)

With the retrofitting of in-room humidification systems, the Robert Koch-Institute protects laboratory staff from health risks and increases their well-being.
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