The following treatment steps can be performed by the re-circulation air handling units: 

• Thermal treatment (cooling, heating)
• Particulate contamination treatment (filtration of air, depending on cleanliness requirements)
• Airborne molecular contamination (AMC) treatment (treatment via air scrubbing; so called "air-washer" (solvents, bases); treatment via chemical filtration (acids, solvents, bases and dopants))
• Sound attenuation treatment 

Properties

• Solely custom made air handling units for the treatment of recirculation air to become supply air to the cleanroom 
• Air volumes from 1,000 to 200,000 cm/h 
• Excellent thermal bridging behaviour (TB1) 
• Flexible, highly reliable, long lasting and energy efficient design 
• High quality components and accessories 
• Possibility to design for outdoor rooftop applications (weatherproof) 
• Possibility for modular design; for large air volumes loose packed delivery with subsequent field assembly 
• Experienced assembly / installation & commissioning teams 
• Air volume adjustment via variable speed (VSD) driven fans 
• Broad project experience especially across Asia