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Recommended checklist for hygienic operation and maintenance of air handling systems
Activity
Outdoor and exhaust air apertures
Structural units/appliance casing
Check for contamination, damage and
corrosion
Air filter
Check for impermissible contamination and
damage (leaks)
Steam humidifier
Wash with cleaning agent,
flush and dry the humidification chamber,
disinfect if required
Check steam lance for deposits
Check the hygiene level
Heat exchanger
Check for contamination, damage and
corrosion
Check the function of the siphon
Check the hygiene level
Fan
Check for contamination, damage and
corrosion
Heat recovery
Check condensate pan and mist eliminator for
contamination, corrosion and correct function
Check the function of the siphon
Check the hygiene level
Air pipes and silencer
Check silencer for contamination, damage and
corrosion
Terminal unit
Check terminal unit and outdoor air filter for
contamination
Check heat exchanger in terminal units without
air filter for contamination
Replace air filter
3040530_201503
Checklist
Action if required
Clean and repair
Replace affected air filters if last filter stage
replacement was within last 6 months,
otherwise replace entire filter stage
Clean
Clean and repair
Repair
Clean and repair
Repair
Repair
Repair
Replace air filter, clean unit
Clean (vacuum cleaner)
Months
12
3
6
6
6
3
3
6
6
3
3
12
12
3
6
12
21
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