
VDI certification ensures the highest level of safety for air humidification
The full-service package includes annual inspection and certification of DRAABE air humidification systems at the user’s premises by the Association of German Engineers (VDI). This ensures that DRAABE systems always comply with the state of the art for in-room air humidification as defined in VDI 6022, Part 6: .
Unlike isolated component tests or general system certifications, the comprehensive VDI certification guarantees compliance with all required hygiene measures, inspection intervals and limit values during ongoing operation.
Minimising liability risk
Section 4 of the Occupational Safety and Health Act requires employers to take the state of the art into account in all occupational safety and health measures. If the state of the art is disregarded, whether intentionally or unintentionally, this may give rise to a liability claim in the event of damage.
With VDI certification, designers, operators and users document the current state of the art and meet occupational safety and health requirements.
*² www.dguv.de, *³ www.vdi.de

Information package: In-room humidification
Always the right fit – find out more here!In-room humidifiers are used specifically where humidity is required. Suitable for every application and room size, ideal for retrofitting, energy-efficient and easy to maintain.
Request your free information package here and get a free thermo-hygrometer to measure your humidity!
A basic requirement for VDI certification is that the systems comply with the general requirements of the German Social Accident Insurance (DGUV). Following this, all equipment, parts and components are additionally inspected for functionality and operational safety by VDI-certified specialist engineers, and a hygiene inspection is carried out. Only then can on-site certification take place at the user’s premises:
Initial certification at the customer’s premises
Comprehensive testing of operational safety and all hygiene functions of the installed system. The scope of testing includes, amongst other things, microbiological and hygienic tests and assessments of cleaning and maintenance intervals.
Annual follow-up certification at the customer’s premises
All significant test parameters (air emissions, bacterial counts, hygiene testing, etc.) from the initial certification are examined and recorded annually by the VDI inspector at the company’s premises.

As part of the certification process, water quality and all relevant microbiological limits are tested and documented:
1. The water supplied to the humidifiers must be of at least drinking water quality in terms of microbiology. The water parameters examined include, for example, pH value, turbidity and temperature.
2. The humidifier water at the system boundary to the room (e.g. nozzle outlet) must comply with all required limit values.

A comprehensive inspection includes regular monitoring of the current air quality in the humidified room. The microbiological components of the indoor air (e.g. mould, spores, bacteria) are sampled, counted and analysed using standardised methods.

Changes in room usage (e.g. equipment density) or room characteristics (extensions, building services, etc.) can have a significant impact on the operation of a in-room humidification system. The scope of the inspection therefore includes, amongst other things, checking the accessibility of all relevant system components, the unimpeded distribution of humidity within the room, and any potential heat sources that may promote microbial growth.
- Greater safety and reduced risk for employers, operators and planners
- Demonstrates the ‘current state of the art’ in accordance with the new VDI guideline
- Meets the requirements of Section 4 of the Occupational Safety and Health Act
- Minimises the risk of liability in the event of a claim in court
- Tests every installed air humidification system during operation
- Surpasses other certificates, such as the DGUV Test mark
- Is the most comprehensive test for both manufacturers and users
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