VDI 6022 hygiene standard: What operators need to know and how digitalization helps.
In many buildings, ventilation stays in the background as long as everything seems to work. Only when complaints arise, odours appear, or readings drift does indoor air suddenly become a priority. This is exactly where VDI 6022 provides guidance: as a hygiene standard for ventilation and air-conditioning systems (AHU/HVAC/RLT systems) and as a practical framework for design, operation, maintenance, and inspection.
For building operators, VDI 6022 is mainly one thing: a system for managing hygiene in a traceable way, rather than relying on gut feeling or isolated actions.
What is the VDI 6022 guideline?.
The VDI 6022 guideline focuses on hygiene in ventilation and air-conditioning systems with the goal of delivering conditioned air without negatively affecting indoor air quality. It describes requirements for the design, installation, and operation of HVAC systems and their components.
In practice, it is often used as a reference when operators define standards for service providers, establish hygiene processes in facility management, or secure requirements during new builds and refurbishments. https://www.vdi.de/en/home/vdi-standards/details/vdi-6022-blatt-1-ventilation-and-indoor-air-quality-hygiene-requirements-for-ventilation-and-air-conditioning-systems-and-units-vdi-ventilation-code-of-practice-1
Which buildings and areas are typically affected?
VDI 6022 becomes relevant wherever rooms are used regularly: offices, schools, public buildings, hotels, sports and event venues, and many production environments. The reason is simple: the more people spend time in a space—and the longer they stay—the more indoor air quality impacts health, comfort, and performance.
A hygienically managed system also protects the equipment itself: contamination and microbial growth increase maintenance effort, energy consumption, and the risk of downtime.
What does VDI 6022 actually require?
VDI 6022 approaches hygiene across the full lifecycle of a system. It’s not about “clean it once,” but about building a setup that works long-term: suitable materials, good accessibility, clear cleaning and maintenance routines, controlled moisture management, and solid documentation.
A key point many underestimate: hygienic performance starts at the design stage. If components are hard to access or condensate accumulates in the wrong places, hygiene becomes more expensive and more error-prone in day-to-day operation.
VDI 6022 checklist: The practical lever for operators.
Anyone working according to VDI 6022 will typically use a structured checklist to ensure inspections are repeatable and not dependent on who is on site. The checklist helps operators stay consistent and track critical areas. Common focus areas include:
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Inspect outside air intakes for blockages and ensure proper filtration.
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Check filter condition, cleanliness, and functionality, replacing if necessary.
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Inspect for visible contamination in ducts or systems and clean if needed.
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Ensure proper moisture/condensate management and check for water damage.
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Confirm accessibility of components for cleaning.
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Review and update maintenance and inspection records.
The real value of the checklist comes when it’s used as a control tool. Tracking changes over time, identifying recurring issues, and noting which actions stabilize the system will lead to more reliable and efficient operations.
Airborne germ sampler VDI 6022: What it is and why it matters.
An airborne germ sampler (Luftkeimsammler) is used to draw a defined volume of air so microorganisms (e.g., bacteria or fungi) can be captured on a medium and later analyzed. In the VDI 6022 context, this is particularly relevant when the hygienic condition of a system needs to be assessed microbiologically.
What matters most is not only the device but the method: sampling points, air volume, boundary conditions (room usage, system operating mode), and robust documentation determine whether results are truly meaningful. https://www.vdi.de/mitgliedschaft/vdi-richtlinien/unsere-richtlinien-highlights/vdi-6022
VDI 6022 airborne germ measurement: What is measured?
VDI 6022 airborne germ measurement (Luftkeimmessung) is often interpreted as a comparative approach: the supply air should not be hygienically worse than reference air (typically outdoor air). The guideline does not rely on a single “one number” assessment; instead, it emphasizes evaluation in context—another reason why sampling plans and documentation are so important.
In practice, airborne germ measurement is especially useful in two situations: during hygiene inspections as an objective finding, and when issues are suspected (moisture, odours, recurring complaints) to define targeted actions instead of reacting blindly. https://www.xn--lftung-reinigung-jzb.at/luftkeimmessung-vdi6022
Why VDI 6022 is more than a technical check.
Hygiene in HVAC systems sits at the intersection of engineering, operations, and microbiological understanding. That’s why VDI 6022 also emphasizes qualification and training. For operators, this is a clear guideline: responsibilities should be defined so checks can be performed and assessed competently—internally or via a suitable service provider.
In reality, this is often the difference between “we do regular maintenance” and “we are truly audit-ready.” Hygiene becomes manageable only when competence, process, and evidence align.
https://www.vdi.de/mitgliedschaft/vdi-richtlinien/unsere-richtlinien-highlights/vdi-6022
From binders to transparent processes.
Many people search specifically for VDI 6022 software because documentation requirements can be heavy in practice. Checklists, inspection reports, maintenance records, measurement data—if these are scattered across emails, spreadsheets, and folders, consistency becomes difficult.
Software brings structure: digital checklists, automated reminders for inspection cycles, centralized storage, and reporting. The biggest advantage is comparability: when data is collected consistently across months and sites, risks become visible earlier and actions can be prioritized more effectively.
Room climate monitoring as an add-on: Making hygiene visible earlier.
VDI 6022 focuses on hygiene in and around the HVAC system, but in everyday operations it also helps to look at actual room climate. Continuous data on CO₂, temperature, humidity, or VOCs can indicate problems before they escalate.
Typical patterns: persistently high humidity can increase mould risk, and repeated CO₂ peaks often indicate a mismatch between occupancy and ventilation strategy. Knowing these patterns helps operators plan maintenance and interventions more precisely instead of relying only on periodic checks.
This is where IoT Fabrikken comes in: with room climate sensors and a platform for analysis, indoor factors can be monitored continuously without heavy IT overhead. This supports better indoor air management and makes it easier to document improvements and actions.
Frequently Asked Questions.
VDI 6022 checklist – what should it include?
Common areas are outside air intake, filters, contamination, moisture/condensate management, accessibility, and maintenance/inspection documentation.
https://www.vdi.de/mitgliedschaft/vdi-richtlinien/unsere-richtlinien-highlights/vdi-6022
Airborne germ sampler (Luftkeimsammler) VDI 6022 – what is it for?
To collect air samples for microbiological analysis, typically during hygiene inspections or when hygiene issues are suspected.
https://www.xn--lftung-reinigung-jzb.at/luftkeimmessung-vdi6022
VDI 6022 airborne germ measurement (Luftkeimmessung) – what’s the goal?
To assess whether supply air is hygienically unobjectionable, often by comparing it with reference air such as outdoor air.
https://www.xn--lftung-reinigung-jzb.at/luftkeimmessung-vdi6022
VDI 6022 software – is it worth it?
Yes, especially for multiple sites or many systems: fewer manual errors, better proof of compliance, faster evaluation.
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