+44(0)1565 722609Here at Clean Environments we specialise in ISO 5 down to ISO 8. In order to achieve these levels you can use a simple fan filter unit which comprises of a pre filter (G filter) and a final filter (EPA, HEPA or ULPA). Or, if you are also controlling temperature and humidity, you would use a HVAC system […]
Category: FAQs
What is a cleanroom certification?
ISO/DIS 14644-3 specifies performance tests for unidirectional and non-unidirectional cleanrooms in the three standard occupancy states (as-built, at-rest, and in operation). There are many tests covered by the ISO/DIS14644-3; Air pressure difference Airflow Airflow direction and visualisation Recovery Temperature and humidity Installed filter system leakage Containment leak Electrostatic and ion generator Particle deposition Segregation The […]
What is a cleanroom?
A cleanroom is an enclosure that controls the amount of particulate (dust and other contaminants) in the space. It does this by controlling a number of factors; The build materials and surfaces in the room need to be designed for easy cleaning and to limit the areas that particulate can build up. Controlling the air […]
What is a micron?
A micron is the unit we use to measure particulate. One micron is equal to one-thousandth of a millimetre. The smallest particle the human eye can see is 30 microns […]
Do I need a positive or negative pressure cleanroom?
This depends on what you are trying to protect. Positive pressure cleanrooms protect the process inside the room from any particulate outside the room. Negative pressure cleanrooms protect the user from the process. Clean Environments have a range of rapid assembly positive pressure cleanrooms. In order to maintain positive pressure, you must make sure that […]
What pressure should I have in my cleanroom?
We would advise that you maintain around 30 pascal of positive pressure inside your cleanroom and 15 pascal in your gowning room. Maintaining this level of pressure will guarantee that no air born contamination will enter your cleanroom. […]
Why does my cleanroom need a pressure gauge?
Maintaining the correct pressure levels is fundamental to the function of the cleanroom. If the pressure is too low contaminants can enter. A magnahelic pressure gauge can measure the differential pressure between the clean (white) zone, gowning room and ambient. […]
What grade is ISO 5?
There are many different ways of describing an ISO 14644-1 class 5 cleanroom. These can include; ISO 5 cleanroom, grade 5 cleanroom, ISO 5, class 5. ISO 14644-1 class 5 is equivalent to the old US federal standard 209 class 100. To compare this to the EU GMP standard, Grade A is approximately ISO class 4.5. […]
Which type of airflow does my cleanroom require?
Laminar Air Flow. ISO 5 (Class 100) and cleaner facilities rely on unidirectional, or laminar, airflow. Laminar airflow means that filtered air is uniformly supplied in one direction (at a fixed velocity) in parallel streams, usually vertically. Turbulent Air Flow.Cleanrooms up to ISO 6 (Class 1,000) do not require laminar airflow and may utilize a non-unidirectional, […]
Why does my clean environment need a filter condition gauge?
The filter condition gauge or minihelic gauge is measuring the differential pressure between ambient and the HEPA filter. This pressure reading will increase over time as the filter blocks. The Clean Environments team will specify your ‘safe range’ on the filter condition gauge; enabling you to accurately assess and maintain your air quality by replacing […]
