Efficacy testing --- OH-Feel hydroxyl generators

Independent effectiveness tests of hydroxyl generators have evaluated the performance of the OH-Feel model series under both real-world and laboratory conditions. These tests cover the 500 Series, which is designed for demanding professional and large-scale applications, as well as the CZ02 series, which addresses the needs of smaller and medium-sized indoor spaces.

The tests document the ability of OH-Feel generators to produce hydroxyl radicals (OH), a natural oxidative mechanism that contributes to the reduction of microbial load, odors, and airborne pollutants. The results confirm the consistent performance of each model group, highlighting the differences and advantages depending on the scope of application and the specific requirements of the space.

View Efficacy studies

Hydroxyl UV Lamp Efficacy – Summary

CETEC & Doherty Institute — Independent Antimicrobial Surface & Airborne Reduction Testing.

Anti-Bacterial & Anti-Viral efficacy testing of the Hydroxyl lamp module,

Airborne Bactericidal Efficacy Test – E. coli

SUMMARY — OH-FEEL 500A

Test conducted by the Guangdong Detection Center of Microbiology (Gmicro),
an internationally accredited governmental laboratory (CNAS & ILAC-MRA),
in accordance with GB 21551.3-2010 (Appendix A).

Airborne Bactericidal Efficacy Test – H1N1 (Influenza A Virus)

SUMMARY — OH-FEEL 500A

Guangdong Detection Center of Microbiology
Test standard: GB 21551.3-2010 (Appendix A)

Airborne Bactericidal Efficacy Test – Staphylococcus Albus

SUMMARY — OH-FEEL 500A

Guangdong Detection Center of Microbiology – Air Disinfection Technical Standard (2002), Article 2.1.3.4

CADR (Clean Air Delivery Rate) Performance Test

SUMMARY — OH-FEEL 500 SERIES

Test conducted by the
Guangdong Detection Center of Microbiology
in accordance with national standard
GB/T 18801-2015,
to evaluate the
CADR (Clean Air Delivery Rate)
performance of the air purification system.

Formaldehyde (HCHO) & TVOC Purification Performance Test

SUMMARY — OH-FEEL 500 SERIES

Test conducted by the
Guangdong Detection Center of Microbiology
in accordance with national standard
JG/T 294-2010,
to evaluate the
formaldehyde (HCHO) and
TVOC purification performance
of the air purification system.

PM10 (Particulate Matter) Purification Performance Test

SUMMARY — OH-FEEL 500 SERIES

This test was conducted by the
NCSR “Demokritos” – Atmospheric Chemistry & Innovative Technologies Laboratory,
in accordance with the standard
CEN/TS 16450:2013,
to evaluate the effectiveness of the
OH-Feel Hydroxyl Air Protection System
in reducing
fine particulate matter (PM10)
in indoor air.

Hospital Efficacy and Safety Accreditation Analysis Tests

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. ( ISO/IEC 17025 laboratory competence requirements)

Tests for Hospital/Medical accreditation – Ozone -CADR – UV Intensity- Bacteria – Staphylococcus Albus.

Hospital Efficacy and Safety Accreditation Analysis Tests (Chinese Report Version)

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. (ISO/IEC 17025 laboratory competence requirements)

Tests for Hospital/Medical accreditation – Ozone -CADR – UV Intensity- Bacteria – Staphylococcus Albus.

Airborne Human Coronavirus (HCoV-229E) Elimination Test

SUMMARY — OH-FEEL CZ02

Guangdong Detection Center of Microbiology (GDDCM)
Report No.: 2021FM08210R03D

Airborne Human Coronavirus (HCoV-229E) Elimination Test

SUMMARY — OH-FEEL CZ02

Guangdong Detection Center of Microbiology (GDDCM)
Report No.: 2021FM08210R03E)

Formaldehyde, Benzene & TVOC Removal Test Summary

SUMMARY — OH-FEEL CZ02

Guangdong Detection Center of Microbiology (GDDCM)
Report No.: 2020FM11788R02D

E. coli airborne bactericidal test summary

Product tested: OH-FEEL 500A

Testing laboratory: Guangdong Detection Center of Microbiology (Gmicro)

Test standard: GB 21551.3-2010, Appendix A Report number: 2020FM06362R02D Issue date: 2020-05-07

1. Testing facility credibility

The Guangdong Detection Center of Microbiology (Gmicro) is a government-operated microbiological laboratory with international accreditation from CNAS and ILAC-MRA. It is one of China’s leading testing institutions for air purification, antimicrobial performance, and environmental safety, and its certifications are widely accepted in Europe, Asia, and international product compliance evaluations.

2. Description of tests conducted

Testing was conducted in accordance with GB 21551.3-2010 (Appendix A), which evaluates the airborne bactericidal performance of air-cleaning devices. The test organism used was Escherichia coli (strain 8099).

A sealed 30 m³ test chamber was conditioned, and the OH-FEEL Hydroxyl Air Protection System was operated at maximum airflow (“0H1” and “0H2” modes) for a total duration of 2 hours.

Air samples were collected using a JWL-6 six-stage microbial air impact sampler at a flow rate of 28.3 L/min. Control samples were collected for 1 minute, while test samples were collected for 5 minutes.

Natural microbial decay was mathematically removed to ensure that all observed reductions were attributable solely to the operation of the OH-FEEL device.

3. Summary of test findings

Initial airborne E. coli concentration (0-hour control):

  • 9.9 × 104 cfu/m³
  • 9.3 × 104 cfu/m³
  • 9.7 × 104 cfu/m³

After 2 hours of OH-FEEL operation:

  • 8.2 × 102 cfu/m³ → 97.95% reduction
  • 9.6 × 102 cfu/m³ → 97.33% reduction
  • 8.5 × 102 cfu/m³ → 98.09% reduction

Average sterilization rate: 97.79%

4. Conclusion

The results confirm that the OH-FEEL Hydroxyl Air Protection System delivers significant airborne bactericidal performance in a controlled 30 m³ environment, achieving near-complete removal of Escherichia coli within a 2-hour treatment period. These findings validate the effectiveness of the OH-FEEL system for airborne bacterial reduction under standardized laboratory conditions.

This summary is provided for clarity. For full experimental data and detailed methodology, please refer to the original laboratory test report.

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H1N1 airborne virus elimination test summary

Product tested: OH-FEEL 500A
Testing laboratory: Guangdong Detection Center of Microbiology (Gmicro)
Test standard: GB 21551.3-2010, Appendix A

1. Testing facility credibility

The Guangdong Detection Center of Microbiology (Gmicro) is a government-operated laboratory with international accreditation from CNAS and ILAC-MRA. It is widely recognized as one of China’s most authoritative microbiological testing institutions, specializing in virology, environmental microbiology, and air purification performance testing. Its reports are accepted internationally for regulatory submission and scientific verification.

2. Description of tests conducted

Testing was conducted in accordance with GB 21551.3-2010 (Appendix A),
using Influenza A (H1N1), strain A/PR/8/34, propagated in MDCK cells.

A sealed 30 m³ test chamber was used. The OH-Feel Hydroxyl Air Protection System was operated at maximum wind speed (level 5), with 0H1 and 0H2 modes activated for a continuous 2-hour treatment period.

Airborne virus particles were quantified using the TCID method. Three control samples were collected at 0 hours, and three test samples were collected after 2 hours of operation. Natural viral decay was mathematically removed to ensure that all observed reductions were attributed solely to the OH-Feel system.

3. Key results

Initial airborne H1N1 concentration (0-hour control):

  • 1.73 × 10 TCID/m³
  • 1.44 × 10 TCID/m³
  • 2.44 × 10 TCID/m³

After 2 hours of OH-Feel operation:

  • 2.44 × 10³ TCID/m³ → 99.17% reduction
  • 1.94 × 10³ TCID/m³ → 99.37% reduction
  • 4.06 × 10³ TCID/m³ → 99.21% reduction

Average H1N1 removal rate: 99.25%

4. Conclusion

The results demonstrate that the OH-Feel Hydroxyl Air Protection System effectively eliminates
airborne H1N1 influenza virus under controlled environmental conditions, achieving near-total
viral removal within a two-hour treatment period.

Report number: 2020FM06362R03D
Issue date: 2020-05-07
Testing laboratory: Guangdong Detection Center of Microbiology

This summary confirms airborne H1N1 virus elimination testing under
GB 21551.3-2010 Appendix A.

This summary is provided for clarity. Refer to the original test report for full data and detailed methodology.

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Staphylococcus albus airborne elimination test summary

Product tested: OH-FEEL 500A
Testing laboratory: Guangdong Detection Center of Microbiology (Gmicro)
Test standard: Disinfection Technical Standard (2002), Section 2.1.3.4

1. Testing facility credibility

The Guangdong Detection Center of Microbiology (Gmicro) is a government-supervised laboratory
accredited by CNAS and ILAC-MRA. It is internationally recognized for microbial,
environmental, and air purification testing and is authorized to conduct airborne disinfection
performance evaluations for regulatory, scientific, and commercial validation.

2. Test description

The test was conducted in accordance with the 2002 Disinfection Technical Standard
(Section 2.1.3.4) for evaluating airborne bacterial elimination.

  • Test organism: Staphylococcus albus (white staphylococcus, strain 8032)
  • Test chamber volume: 20 m³
  • Device operating mode: OH1 + OH2 activated, wind speed level 3
  • Test duration: 1 hour
  • Sampling equipment: JWL-6 six-stage microbial air sampler at 28.3 L/min
  • Control sampling time: 1 minute
  • Test sampling time: 5 minutes

Natural microbial decay in air was mathematically removed to ensure that the results
accurately reflect the true sterilization capability of the OH-FEEL unit.

3. Key results

Initial airborne bacteria concentration (control):

  • 5.4 × 10 cfu/m³
  • 5.4 × 10 cfu/m³
  • 5.6 × 10 cfu/m³

After 1 hour of OH-FEEL operation:

  • 21 cfu/m³ → 99.93% reduction
  • 28 cfu/m³ → 99.92% reduction
  • 21 cfu/m³ → 99.94% reduction

Average Staphylococcus albus reduction: 99.93%

4. Conclusion

The test results confirm that the OH-FEEL Hydroxyl Air Protection System provides
highly effective airborne elimination of Staphylococcus albus in a controlled
20 m³ environment, achieving near-complete bacterial reduction within a 1-hour
treatment period.

Report number: 2018FM12289R01
Issue date: 2018-12-14
Testing laboratory: Guangdong Detection Center of Microbiology

This summary confirms airborne Staphylococcus albus elimination testing
under the 2002 Disinfection Technical Standard.

This summary is provided for clarity. Refer to the original test report for full data
and detailed methodology.

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CADR (Clean Air Delivery Rate) Performance Test Summary

Product Tested: OH-FEEL 500A

Testing Laboratory: Guangdong Detection Center of Microbiology (Gmicro) – Air Purification Testing

1) Testing Facility Credibility

The Guangdong Detection Center of Microbiology (Gmicro) is a government-backed bio-environmental laboratory in China
operating under CNAS and ILAC-MRA international accreditation. Its test data is accepted globally for product
certification, import/export compliance, and performance verification. Gmicro specializes in microbiology,
environmental air quality testing, particulate analysis, and national air-cleaner performance standards, supporting
its authority for CADR evaluation.

2) Description of Tests Conducted

Testing followed the national air purifier performance standard GB/T 18801-2015. A controlled
30 m³ chamber was conditioned to 24.9°C and 59% relative humidity.
A standardized aerosol particulate load was introduced, and the decay rate of airborne particles was measured over
time.

CADR was calculated using the official decay-curve formula based on repeated air sample readings taken at intervals
throughout a 20-minute test cycle. This method determines how quickly the device reduces particulate
matter and is a primary recognized metric for real-world air cleaning performance.

3) Summary of Test Findings

The tested OH-Feel unit demonstrated effective particulate reduction inside the 30 m³ chamber. Particle
concentration decreased steadily during the test window, confirming active particulate removal consistent with
measurable CADR performance. Under these conditions, the measured particulate CADR was approximately
288 m³/h, indicating strong clean air delivery capability for the unit.

Readings documented in report 2018FM12290R03 verify the device’s ability to accelerate removal of
airborne particles versus natural sedimentation.

Test Administrative Details

  • Testing Laboratory: Guangdong Detection Center of Microbiology
  • Issue Date: December 4, 2018
  • Standard: GB/T 18801-2015


This summary is provided for clarity. Refer to the original test report for full data and methodology.