HOSPITAL ACCREDITATION ANALYSIS SUMMARY

Guangdong Detection Center of Microbiology (CNAS Accredited Laboratory)

1. Testing Facility Credibility

The Guangdong Detection Center of Microbiology (GDDCM) is a CNAS-accredited national laboratory specializing in medical disinfection standards, microbiological testing, sterilization performance, and air-quality safety evaluations. It is one of China’s leading recognized authorities for medical grade air disinfection validation and HVAC compliance. This accreditation ensures strict adherence to ISO/IEC 17025 laboratory competence requirements.

2. Description of the Tests Performed

The OH-Feel OH500F08 underwent multiple medical grade evaluations, including:

  • Ozone concentration assessment — measured according to GB 28235-2020. Results across repeated sampling averaged 0.006 mg/m³ (~3 ppb), confirming extremely low ozone output. (Page 3)
  • Circulating air volume measurement — conducted using the GB/T 14295-2008 Appendix B method. The OH500F08 achieved an average circulating air volume of 477.3 m³/h. (Page 4)
  • UV leakage safety test — measured at a 30 cm perimeter distance as required by GB 28235-2020. UV radiation leakage was recorded as 0 µW/cm², meeting the strict requirement of <5 µW/cm². (Page 4)
  • Ultraviolet radiation intensity (operational) — measured for 10 minutes at 1 minute intervals. The sterilization UV lamp maintained a stable average intensity of 175.2 µW/cm². (Page 5)
  • Airborne bacteria removal test – 40 m³ test chamber — GB test method. Reduction of natural airborne microbes reached: 92.83% after 2 hours; 92.94% after 3 hours. (Page 6)

3. Staphylococcus albus Disinfection Test (Medical-Grade Standard)

The OH500F08 was tested in a controlled 20 m³ aerosolized bacterial chamber following the Technical Standard for Disinfection (Ministry of Health P.R. China). This test evaluates professional hospital grade sterilization capability. (Page 7)

Results:

  • 1 hour: 99.79% kill rate (Staphylococcus albus)
  • 2 hours: 99.97% kill rate
  • 3 hours: 99.97% kill rate

These disinfection levels meet — and in many cases exceed — requirements for hospital air sterilization devices.

4. Summary Statement

Based on the official medical grade evaluations performed by the CNAS accredited Guangdong Detection Center of Microbiology, the OH-Feel OH500F08 meets the standards for hospital level air disinfection systems. It demonstrates:

  • Ultra low ozone emission (~3 ppb)
  • Zero UV leakage
  • High circulating air volume (477.3 m³/h)
  • Strong UV sterilization output (175.2 µW/cm²)
  • >99.97% microbial elimination performance

This confirms the OH500F08 is suitable for use in medical environments requiring validated air sterilization.

Report No.: 2022FM10597R01E

Test Completion Date: 2022-06-24

This summary is provided for clarity.

Refer to the original test report for full data and methodology.

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