1. Contamination sources

• fresh air intake
• return ductwork plenum
• Mixing plenum and filtration unit
• Blower and coil section
• Sound attenuator and supply ductwork
• Diffusers and vav and mixing box

2. Methodology

• Traditional : manual cleaning with vacuums
• specialised
• robotised
• robotised equipment
• speck bag
• decontamination