Evidence & Test Results
Evidence-led Healthy Air systems
Healthy Air Technology Ltd develops air purification systems for homes, workplaces, healthcare, education, vehicles and retrofit buildings. This page brings together available evidence from product testing, external assessment, real-world monitoring and customer case studies.
Healthy Air Technology systems combine HEPA-13 filtration, patented D-Orbital Nano Oxide (DNO) catalyst technology, smart sensing and airflow design to support better indoor air quality in occupied spaces.
Evidence at a glance
Product and laboratory testing
Measured performance under defined conditions
Testing covers clean air delivery rate, particulate performance, selected gaseous pollutants, selected biological indicators, ozone and certification data.
Independent and external studies
Assessment in real indoor environments
External studies include clinical-environment monitoring by MTIF and office indoor air quality assessment by CETEC.
Case studies and user evidence
Observed use in customer settings
Case studies show how Healthy Air Technology systems have been used in healthcare, dental, workplace, sport, domestic and retrofit-related environments.
Evidence pathways
Product and laboratory testing
What has been measured under controlled conditions?
Product and laboratory testing helps show how Healthy Air Technology systems perform under defined methods. This evidence is useful for product specification, room sizing and technical evaluation.
Clean air delivery
CADR and particulate testing for indicators such as smoke, dust, pollen and PM2.5.
Selected gases and odours
Testing includes selected pollutants such as nitrogen dioxide, sulphur dioxide, formaldehyde and TVOCs.
Biological indicators
Laboratory testing includes selected bacterial and viral indicators under defined test conditions.
Safety and compliance
Evidence includes ozone assessment and certification data for selected Healthy Air Technology systems.
Independent and external studies
What has been observed in real spaces?
External studies help show how Healthy Air Technology systems behave outside laboratory conditions. These studies should be interpreted as evidence from specific environments, not as universal performance guarantees.
MTIF GP practice study
Clinical-environment monitoring of bacteria and mould indicators over a 10-day period.
CETEC office assessment
Office assessment measuring particulate matter and TVOC concentrations during operation.
External listing data
Selected Healthy Air Technology portable systems appear in Singapore NEA portable air cleaner listing data.
Built environment relevance
Useful for workplaces, healthcare, education and retrofit settings where air quality and energy use must be considered together.
Case studies and user evidence
How are Healthy Air systems used by customers?
Case studies provide deployment context, customer experience and practical evidence. They show why a system was selected, how it was used and what was observed in that setting.
Healthcare and dental
Use in clinics, hospitals, dental practices, treatment rooms and waiting areas.
Workplaces
Use in offices, engineering environments and shared working spaces.
Homes and vulnerable users
Use in family homes and personal environments where reassurance and comfort are important.
Retrofit and low-energy buildings
Use where ventilation upgrades may be difficult, disruptive or energy-intensive.
Product and laboratory testing
Clean air delivery
CADR and particulate performance
Healthy Air Technology systems have been tested for clean air delivery rate and particulate performance, including smoke, dust, pollen and PM2.5 indicators.
CADR testing
PM2.5
Smoke
Dust
Pollen
Selected gaseous pollutants
Gas-phase and odour indicators
Testing includes selected gas-phase pollutants relevant to indoor and outdoor air quality, including nitrogen dioxide, sulphur dioxide, formaldehyde and TVOCs.
NO₂
SO₂
Formaldehyde
TVOCs
Odours
Biological indicators
Selected bacteria and virus indicators
Product testing records include selected biological indicators under defined standards and laboratory conditions.
H1N1 indicator testing
Coronavirus 229E indicator testing
Bacterial indicator testing
Safety and certification
Ozone and compliance evidence
Product testing includes ozone assessment and certification information for selected Healthy Air Technology systems.
Ozone testing
CE certification
Selected FCC certification
Technology evidence
Healthy Air Technology systems use D-Orbital Nano Oxide (DNO) catalyst technology alongside HEPA-13 filtration. HEPA-13 filtration captures fine airborne particles, while DNO catalyst media are designed to address selected gaseous pollutants, odours and biological contaminants at the catalyst surface under appropriate conditions.
Filtration
HEPA-13 particle capture
Supports reduction of fine airborne particles such as dust, pollen and other particulate matter.
Catalyst media
DNO catalyst technology
Designed to address selected gases, odours and biological contaminants at the catalyst surface.
Airflow
Smart sensing and airflow design
Helps systems respond to changing indoor conditions and distribute treated air through occupied spaces.
Independent and external studies
Clinical-environment monitoring
MTIF GP practice study
A June 2024 study conducted by MTIF at Nottingham Trent University monitored bacteria and mould indicators in a GP practice over a 10-day period.
The study collected air samples across background, device-testing and post-device periods. It reported reduced mould levels and a downward trend in bacterial levels while the air purifier was in use.
Office air quality assessment
CETEC office study
A CETEC office assessment examined particulate matter and TVOC concentrations before and after introducing a Healthy Air Technology system during a defined test period.
The study reported reductions in PM2.5, PM10 and TVOCs during operation under the stated test conditions.
External listing
Singapore NEA portable air cleaner listing
Selected Healthy Air Technology portable systems appear in Singapore NEA portable air cleaner listing data.
Built environment context
Office, healthcare and retrofit relevance
External and project evidence is especially relevant for buildings where indoor air quality, energy use, occupancy patterns and ventilation constraints must be considered together.
Case studies and user evidence
Healthcare and dental
Hospitals, clinics and dental settings
Case studies include healthcare, hospital and dental environments where Healthy Air Technology systems were selected to support indoor air quality in occupied professional spaces.
Workplaces
Offices and shared working environments
Workplace case studies include offices, engineering environments and shared workspaces where customers wanted additional air cleaning alongside existing building-management measures.
Homes and retrofit
Domestic and low-energy buildings
Home and retrofit-related case studies describe customer experience in everyday living spaces, vulnerable-user settings and buildings where ventilation changes may be difficult.
How to interpret these results
Context matters
Results depend on the room
Indoor air quality results are affected by room size, ventilation rate, occupancy, pollutant source, product placement, operating mode, filter condition and measurement method.
A result from one laboratory test, field study or case study should not be treated as a universal guarantee.
Right system, right setting
Evidence should guide product selection
The most useful approach is to match the system to the space, considering room size, pollutant source, ventilation, occupancy pattern, required clean-air delivery and maintenance plan.
HATL can support product selection for homes, workplaces, healthcare, education, vehicles and retrofit buildings.
Documents available
The following evidence documents can be made available for customers, consultants, councils, healthcare providers, schools, retrofit partners and project teams.
Testing
Product Testing Overview
Summary of product test results, including CADR, selected biological indicators, selected gas-phase pollutants, ozone and certification data.
Technology
DNO White Paper
Technical paper on D-Orbital Nano Oxide catalyst technology for indoor air purification.
Clinical setting
MTIF GP Practice Study
Clinical-environment monitoring of bacteria and mould indicators over a 10-day period.
Office setting
CETEC Office Study
Assessment of particulate matter and TVOC concentrations in an office setting.
External listing
Singapore NEA Listing
External portable air cleaner listing data for selected Healthy Air Technology systems.
Deployments
Case Studies
Deployment examples from healthcare, dental, workplace, elite sport, domestic and retrofit-related settings.
Detailed certificates, raw test documents and project-specific evidence packs are available on request where appropriate.
Evidence FAQs
Are Healthy Air Technology systems independently tested?
HATL has evidence from product testing, external assessment and real-world studies, including clinical-environment monitoring by MTIF and office air quality assessment by CETEC. Test conditions, methods and measured pollutants vary by study.
Do results apply to every room?
No. Results depend on room size, ventilation, occupancy, pollutant source, product placement, operating mode and maintenance. HATL can help assess which system is suitable for a specific space.
Can air purifiers replace ventilation?
No. Healthy Air Technology systems support indoor air quality management and can add recirculated air cleaning, but they should be used alongside appropriate ventilation, source control, building-management and infection-control requirements.
What does CADR mean?
CADR stands for Clean Air Delivery Rate. It indicates the volume of cleaned air delivered by a unit under a defined test method. CADR is useful for product sizing, but it should be interpreted with room size, layout, ventilation, occupancy and pollutant sources.
What does DNO add beyond HEPA filtration?
HEPA-13 filtration captures fine airborne particles. D-Orbital Nano Oxide (DNO) catalyst technology is designed to address selected gaseous pollutants, odours and biological contaminants at the catalyst surface under appropriate conditions.
Can HATL provide evidence for procurement or specification?
Yes. HATL can provide product specifications, evidence summaries and selected test documents for consultants, councils, healthcare providers, schools, housing associations and building owners.
Need evidence for a project?
For councils, healthcare providers, schools, housing associations, consultants and building owners, HATL can provide product specifications, evidence summaries and project-specific guidance.
Contact Healthy Air Technology to request the evidence pack or discuss product suitability for your space.