International Indoor Air Quality Institute

Healthy Indoor Air Quality Certificate For Commercial Property

Promoting Healthier Working and Public Spaces


Our certification program is designed to help building owners, managers, or occupants demonstrate your commitment to providing a healthy and safe indoor environment for clients, employees and public.

We offer four different levels of certification, each with its own set of requirements and benefits and based on the latest scientific research and industry standards. 

Benefits For Businesses and Commercial Properties

  • Employee Health: Good quality indoor air proven scientifically to boost employee productivity and well-being. Studies demonstrated a decrease in absenteeism and chronic illnesses among building occupants.
  • Customer Confidence: Assure customers of your commitment to their health.
  • Market Differentiation and improved public image:
    • Stand out as an IAQ-conscious organisation
    • Enhanced reputation as a responsible organization
    • Competitive advantage in the marketplace
  • Reduced risk of health problems associated with poor indoor air quality and minimize the spread of viruses.
  • Increased building value and marketability
  • Legal Compliance: Stay ahead of regulations and compliance requirements

Who Should Get Certified

Our Healthy IAQ Certificates are available for a wide range of businesses and commercial properties, ensuring that regardless of the type of building or space, we can provide a certification for your indoor air.

  • Office Buildings
  • Office Environment Workplaces (Offices, co-working spaces)
  • Healthcare Facilities (Medical Centres, Dentist Offices, Day Care facilities, Retirement Homes, Vets, etc)
  • Wellbeing (Spas, Gyms,  Yoga Studios, Meditation centres, etc)
  • Education (Schools, Universities, Colleges, etc)
  • Hospitality (Hotels, B&Bs, Holiday Rentals, Airbnbs, Coffee Shops, Restaurants, etc) 
  • Government entities

Why Choose Our Certification Program

  1. Scientifically Grounded
    • Our certification program is firmly grounded in the latest scientific research. We draw insights from reputable sources such as the World Health Organization (WHO) and leading universities.
    • By staying abreast of advancements in indoor air quality, we ensure that our guidance is accurate, evidence-based, and relevant.
  2. Industry Standards
    • At our core, we adhere to industry best practices and recognized standards, including the new BS 40102 .
    • This commitment ensures that our program maintains credibility, reliability, and alignment with established guidelines.
  3. Most Comprehensive Indoor Air Quality Certification In The World
    • 11 Indoor air quality parameters measure: Temperature, Humidity, CO2, CO, VOCs, Formaldehyde, O3, NO2, PM 2.5, PM 10, Radon
    • No other certification program covers such a comprehensive range of pollutants.

Certification Process

Step 1

Application and Payment Submission

  • Submit an application for the Healthy Indoor Air Quality Certificate.
  • The application includes relevant details about the property/space, such as its type, location, and contact information.
  • Payment of the registration fee is processed at this stage.
Step 2

Engagement with an IIAQI Assessor Accredited Professional


  • Once the application is received, it is essential to appoint an IIAQI Accredited Professional.
    • If you have yet to select an Accredited Professional, our directory is available to assist you in finding a qualified individual.
  • They will assess your indoor air quality and provide a report and will also act as the primary point of contact throughout the certification process.


Please be aware that the fees for the services of an IIAQI Assessor Accredited Professional, which include the Healthy IAQ Certificate assessment and any consulting work, are separate from our registration and data review fees.

Step 3

On-Site Assessment by the IIAQI Assessor

The IIAQI Assessor visits your premises to conduct the assessment.

Key activities during the on-site visit include:

  • Layout Inspection: The Assessor examines the property/space layout, including room configurations, ventilation/HVAC entry and exit points, and ventilation systems available.
  • Occupancy Analysis: The Assessor records the number of people in each room or area.
  • IAQ Monitors Placement: IAQ monitors will be strategically placed in compliance with our standards. The Assessor will also capture photographic evidence to verify correct monitor installation.
Step 4

Data Collection and Review


  • The IAQ monitors collect data over 9 days.
  • Our Data system receives the data from the monitors and compiles the data.
  • We review the data for compliance with our published standards.
Step 5

Certificate Issuance

  • If the data demonstrates compliance, the Healthy Indoor Air Quality Certificate is issued.
  • The certificate includes the respective grade (Healthy, Healthy Plus, Healthy Excellence, Healthy Leader) based on the overall IAQ performance
  • The certificate is issued, which can be displayed prominently and proudly by the building owner or the business occupying the space

Continuous Monitoring and Renewal For Commercial Spaces (optional)

  • To achieve Healthy Excellence and Leader certification regular monitoring is required besides the certification assessment.
  • The certificate is renewed automatically.
  • After the second year, an IIAQI AP will have to assess if the IAQ monitors are still calibrated and if the sensors are in working order. 
  • Renewal involves quarterly data review.


Certification Grades

This is our entry-level certification.

This level of certification indicates that the indoor air quality meets the minimum requirements for acceptability in relation to IIAQI Healthy IAQ Certificate Standards. 

The parameters measured include temperature, humidity, particulate matter (PM2.5 and PM10), carbon dioxide (CO2), volatile organic compounds (VOCs), formaldehyde, ozone (O3), nitrogen dioxide (NO2), carbon monoxide (CO), and radon. The readings for these parameters must be within the acceptable range defined by IIAQI Healthy IAQ Certificate Standards

This level of certification is ideal for businesses and organisations that want to ensure that their indoor air is healthy and safe for occupants.

The Healthy Plus IAQ Certificate is the second level of our indoor air quality certification program. 

At this level, the indoor air quality parameters are measured to ensure that they show “low” measurements in relation to IIAQI Healthy  IAQ Certificate Standards, including Temperature, Humidity, PM2.5, PM10, CO2, VOCs, Formaldehyde, O3, NO2, CO, and Radon.

This indicates that the businesses and organizations are not only meeting the minimum requirements for acceptability but is also making efforts to maintain a healthier indoor environment.

The Healthy Excellence IAQ Certificate is the third level of our indoor air quality certification program. 

This level of certification is achieved when the IAQ readings show “low” readings for all indoor air quality parameters measured, including Temperature, Humidity, PM2.5, PM10, CO2, VOCs, Formaldehyde, O3, NO2, CO, and Radon, in relation to IIAQI Healthy IAQ Certificate Standards.

 In addition, the businesses and organisations must have applied for a continuous monitoring program to ensure that the indoor air quality remains healthy over time. This level of certification recognises buildings that have made a commitment to maintaining a healthy indoor environment and are proactively monitoring and managing indoor air quality.

The Healthy Leader IAQ Certificate is the highest level of certification, and it requires that the building demonstrate “very low” readings for all indoor air quality parameters measured against IIAQI Healthy IAQ Certificate Standards. This includes measurements of Temperature, Humidity, PM2.5, PM10, CO2, VOCs, Formaldehyde, O3, NO2, CO, and Radon.

In addition, the building must have applied for a continuous monitoring program and the building uses healthy materials in its construction, renovation projects and furnishings and fittings. 

This level of certification recognises businesses and organisations have achieved leadership in indoor air quality management and are committed to maintaining a healthy indoor environment for occupants.

Healthy Indoor Air Quality Certificate Pricing For Commercial Property

The cost of certification varies depending on the level of certification and the size of your building. Please contact us for a quote tailored to your specific needs. Payment is due upon submission of your application.

Case Studies

Coming Soon

Frequently Asked Questions (FAQs)

What is an IIAQI Assessor Accredited Professional

An IIAQI Assessor Accredited Professional is a qualified and experienced professional who has been accredited by the IIAQI to assess indoor air quality.

How long does the certification process take?

The certification process typically takes 4-6 weeks, but this can vary depending on the complexity of the assessment and the time it takes to address any issues that have been identified.

Can I appeal a certification decision?

Yes, if you are not satisfied with a certification decision, you can appeal the decision.