Frequently asked questions

Here 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

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

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

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

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

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

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

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

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

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