Clean Air Module


Clean Air Modules are designed for environments where a higher air purity is to be achieved, however, these areas must not have increased cleanroom quality. For environments with higher purity air, which must have no increased cleanroom quality.

The clean air systems can be fitted to a wall, floor or ceiling with a variety of types of activated carbon filters to remove different chemical fumes or noxious smells, alternatively, they can be fitted with a HEPA (High Efficiency Particulate Air) filters for particulate and bacteria removal. Clean Air Module, available in a standard or high flow type, was designed to easily obtain clean air. The space-saving module design reduces piping man-hours. The series is assembled and double-packed in a clean room environment.


Positive pressure is a pressure within a system that is greater than the environment that surrounds that system. Consequently, if there is any leak from the positively pressured system it will egress into the surrounding environment. This is in contrast to a negative pressure room, where air is sucked in.

Use is also made of positive pressure to ensure there is no ingress of the environment into a supposed closed system. A typical example of the use of positive pressure is the location of a habitat in an area where there may exist flammable gases such as found on an oil platform or laboratory cleanroom. This kind of positive pressure is also used on operating theaters and in vitro fertilisation (IVF) labs.


Re-circulating cleanroom airflow systems filter air through a dedicated air handling system specifically designed and engineered to maintain the cleanroom at the required operating environmental tolerances. Re-circulating airflow systems offer temperature, relative humidity, and pressurization controls through an interface on the air handling unit itself. These systems are typically paired with static HEPA filtration modules instead of fan powered modules.

Unidirectional airflow inside a recirculating cleanroom can be achieved via careful placement of HEPA filtration modules and low level returns, which direct airflow and heat load removal in areas of the cleanroom environment that require higher airflow. In some cases, lower ISO-class recirculating cleanrooms can also be filtered via HEPA units in line with the supply air from the HVAC system, rather than ceiling mount modules. This helps reduce cost and maintenance requirements in the future.