FAQ - Frequently Asked Questions
For further information, please have a look at our bibliography.
The term clean room refers to a room in which the number of particles in the air is limited by so-called filter fan units (FFU, also known as flow boxes) in order to protect certain work processes or products from contamination.
It is believed that the need for higher air purity arose for the first time in the small series production of optical parts. At the same time, medicine probably recognized that contamination and pathogens, which are also transmitted through the air, can have an impact on the survival or death of a patient in the operating room. The first real clean rooms then probably found their origin in medicine.19
The ISO EN 14644-1 standard defines nine clean room classes, which are determined by a maximum value of the particle load in the air per m³. The degree of cleanliness of a clean room is thus determined by ISO classes. Overall there is ISO 1 to ISO 9, with ISO 1 representing the highest purity and ISO 9 the lowest. 20
DIN, ENISO. "14644-1: 2016-06: Cleanrooms and associated cleanroom areas - Part 1: Classification of air cleanliness by particle concentration (ISO 14644-1: 2015); German version."
HEPA is the abbreviation for High-Efficiency Particulate Air/Arrestance, i.e. a highly efficient particle filter. HEPA filters were originally developed for nuclear bunkers in the 1940s to filter contaminated particles from the air so that they did not get inside the bunker 18 22. They remove over 99.995% of all particles in the Most Penetrating Particle Size, typically 0.3 μm. Larger particles are separated practically 100%. 9
The FFUs are controlled directly on the device using a 3-stage controller. These three levels are divided into a volume flow of 600 m³/h on level one, 800 m³/h on level two and 1000 m³/h on level three. With this very easy control, no training is necessary and a minimum level of cleanliness is always guaranteed with 600 m³/h.
For both devices we use open, 45 mm type B aluminum profiles.
The standard paneling of the laminar flow box is made of Plexiglas. For the clean room enclosure, we use monolithic PVC curtains. Other trims can also be installed as needed.
The use of laminar flow boxes with curtains offers the advantage that you can optimally organize your workplace. You can feed in cables, hoses and other inputs and outputs flexibly from any side.
Louvres are often pushed to the side during use and thus reveal the clean room atmosphere. With a monolithic curtain, you lean under the curtain and thus ensure maximum cleanliness even while working.
The main filter change (HEPA 14) of the filter fan units depends on the surrounding atmosphere. If the flow box is kept in a clean atmosphere, a filter change will be necessary every 3-4 years. In a rather dirty atmosphere, a filter change is recommended every 1-2 years. The pre-filter should be washed out under running water every 6 - 12 months.
To replace the HEPA-14 filter, the Filter Fan Unit is lifted, the old filter is removed and the new filter is placed. Make sure that at least two people are involved in changing the filter due to the weight of the FFU.
The advantage of the walkaround variant is that it is more convenient to work with.
Yes, elements such as monitors, lamps, power strips, shelves and other elements can be attached to the open profiles with the 10 groove.
Yes, our laminar flow box is available both as a tabletop device and as a standalone device, with castors if required.
Yes, on request we can integrate a honeycomb breadboard directly into the laminar flow box for an optimal clean room workplace in optics and laser technology.
Yes, non-outgassing TPE curtains can be used for highly sensitive UV lasers.
Furthermore, one should also pay attention to the volume with the corresponding volume flow.
No, we attach great importance to the fact that all our products can be serviced quickly and easily (changing the filter and pre-filter).
In principle, the pre-filter for the coarse particles does not have to be completely replaced. Here it would be important to wash out the pre-filter and running water every 3-6 months and let it dry before use. However, if the pre-filter is damaged, it must be replaced for further use.
No, there is hardly any draft in front of the room air purifier. On the one hand, the room air cleaner has a huge filter surface. As a result, the air speed can be kept low with a consistently high volume flow. On the other hand, the exiting air is almost laminar, i.e. low in turbulence. Humans particularly feel turbulence on their skin, so this low-turbulence air hardly draws. 2
UV-C radiation has proven to be an effective means against viruses and bacteria. However, UV-C radiation is so strong that it has an ionizing effect. If you treat the air in the air purifier with UV-C radiation, ozone can be created. Ozone is an aggressive oxidizing agent that can damage the lungs. In addition, the UV radiation needs time to effectively render viruses and bacteria harmless. As a result, a high volume flow cannot be guaranteed and the room air is not filtered often enough. 23
We still recommend wearing gloves and, if necessary, a face mask, as larger dust particles or moisture can remain on the inside of the filter. 21
Yes, the room air purifier is a very effective tool in the fight against pollen allergies, as it effectively removes pollen, bacteria, viruses, spores, fine dust and other particles from the room air.
You will receive the room air purifiers within a few days of ordering. The delivery of cleanroom products takes an average of 4-6 weeks. We attach great importance to always keeping our inventory high so that we can deliver reliably and quickly. In the case of individual requests, we will actively consult with you about the delivery and the delivery time.
The clean room enclosure is delivered in individual parts on pallets. The assembly can be carried out with the supplied tools and the assembly instructions within a few hours without previous knowledge.
We are happy to offer you assembly as a service. Please contact us for an individual offer.