Indoor Air Quality Testing
Quantify PM2.5/PM10, CO2, CO, NO2, VOCs, mould spores and ozone against ASHRAE, WHO and green-building thresholds. Indoor air can be up to 5x more polluted than outdoor air, so testing is the only way to know for sure.
What is indoor air quality testing?
Indoor air quality (IAQ) testing measures the pollutants trapped inside a building, including particulate matter, gases, VOCs and biological contaminants, and checks them against recognised health and comfort thresholds. It matters because indoor air can be up to five times more polluted than the air outside: unfiltered HVAC systems, off-gassing paints and furniture, damp-area mould, and poor natural circulation all concentrate pollutants indoors with nowhere for them to go.
Equinox Labs measures particulate matter, CO2, CO, NO2, VOCs/formaldehyde, mould spores and ozone at NABL-accredited (ISO/IEC 17025) laboratories, trusted by 95,000+ clients across food, water, environment and air testing. Our field engineers monitor during normal working hours, so readings reflect what your occupants actually breathe. It's often paired with our outdoor air quality testing and broader environmental testing services.
What causes indoor air pollution?
Indoor air quality can be affected by ventilation, building materials, indoor activities and pollutants entering from outdoors.
- Unfiltered air conditioners and HVAC systems recirculating stale air
- Emissions from cleaning products, paints and new furniture (VOCs)
- Mould growth in damp areas: bathrooms, basements, AC ducts
- Poor natural air circulation in sealed, centrally air-conditioned floors
- Infrequent duct or vent cleaning letting dust and particulates build up
- Outdoor PM2.5 infiltrating through HVAC intakes during high-pollution months
What Does Indoor Air Quality Testing Cover?
From particulates to biological contaminants, one visit covers the full indoor air panel.
Particulate & CO2 Monitoring
PM2.5/PM10 infiltration and CO2 build-up from occupancy, tracked against ASHRAE ventilation guidance.
VOC, Formaldehyde & Gas Testing
CO, NO2, ozone and VOC off-gassing from paint, furnishings and cleaning products, measured against WHO/IGBC thresholds.
Mould & Biological Screening
Mould spore sampling in damp-prone areas (bathrooms, basements and AC ducts) to catch hidden growth.
Green Building Credit Reporting
Structured reports mapped to IGBC, LEED and WELL indoor air credit requirements, ready for your consultant.
Thermal Comfort & Ventilation
Temperature, relative humidity and air exchange rate checks to confirm your HVAC is delivering properly ventilated air.
Post-Renovation Air Clearance
Pre-occupancy testing after renovation, fit-out or construction, so a space is cleared before people move back in.
Parameters we monitor
Available parameters depend on the selected testing scope, the building environment and the objective of the assessment.
Particulates
Gaseous & VOCs
Biological & Comfort
Who should test indoor air quality?
Any occupied indoor space benefits. These are the ones we test most often.
Corporate Offices & Tech Parks
Periodic IAQ checks for sealed, centrally air-conditioned floors where CO2 and VOCs build up unnoticed.
Hospitals & Healthcare Facilities
Indoor air linked directly to patient recovery, making it a standing priority in critical care areas.
Schools, Colleges & Green-Building Campuses
IAQ baselines supporting IGBC, LEED or WELL certification alongside student and staff wellbeing.
Residential Complexes
Whole-building IAQ checks for housing societies and builders handing over completed towers.
Fitness Centers
High-occupancy, high-exertion spaces where CO2 and ventilation matter more than most realise.
Malls, Hotels & Auditoriums
Large public venues where crowd density and long dwell times raise indoor pollutant exposure.
How to improve indoor air quality
Use indoor air measurements to identify potential concerns and guide practical steps such as source control, appropriate ventilation, filtration and moisture management.
- Add Air Purifiers. Install HEPA or activated-carbon purifiers in high-occupancy rooms to catch fine particulates and VOCs.
- Add Purifying Plants. Use air-purifying plants alongside mechanical filtration to help absorb everyday indoor pollutants.
- Control Humidity & Pests. Run pest and humidity control in damp-prone areas to stop mould growth before it starts.
- Clean Ducts & Vents. Schedule regular duct and vent cleaning to clear the particulate build-up that recirculates otherwise.
- Switch To Low-VOC Products. Avoid harsh chemical cleaners and paints; low-VOC alternatives cut off-gassing at the source.
- Increase Ventilation. Open up natural ventilation paths wherever the building layout allows it, to dilute what builds up indoors.
The air you breathe at work, explained
Video
Your Workplace Air Could Give You Cancer!
- The everyday office pollutants most teams never think to test for
- Why a clean-looking office can still be carrying unsafe indoor air
- What a proper IAQ lab report checks that a consumer air monitor doesn't
Sample to certified report, in four steps
The same process across every indoor air quality engagement.
Inquire
Tell us your floor plan, occupancy and which pollutants matter most.
On-Site Monitoring
Our field engineers place calibrated samplers and direct-read monitors during normal working hours.
Lab Analysis
Collected samples are analysed at our NABL-accredited labs against ASHRAE, WHO and green-building thresholds.
Results & Support
We email a structured report with pollutant levels, sources, health-risk interpretation and actionable advice.
Access the Equinox PortalWhy Choose Equinox Labs for Indoor Air Quality Testing?
Accredited methodology, calibrated field equipment, and a team fluent in green-building credit requirements.
NABL Accredited
ISO/IEC 17025 accredited testing means your reports are defensible with any auditor or certifying body.
Pan-India Field Teams
Calibrated monitoring equipment deployed across 500+ cities, with consolidated reporting for multi-site chains and franchises.
Trusted by 95,000+ Clients
An FSSAI-notified, NABL-accredited testing and compliance partner relied on by 95,000+ clients across India.
A Dedicated Account Manager
One point of contact who tracks your monitoring calendar across every site.
Indoor Air Quality Testing FAQs
Indoor air quality (IAQ) testing measures selected pollutants and environmental conditions inside a building. Depending on the testing scope, these may include PM2.5, PM10, carbon dioxide, carbon monoxide, nitrogen dioxide, VOCs, formaldehyde, ozone, mould and selected comfort or ventilation parameters. Results help assess the measured conditions against relevant criteria.
Testing frequency depends on building use, occupancy, potential pollutant sources, previous results and applicable requirements. An assessment may be appropriate after renovation, changes to HVAC systems, water damage, persistent odours or occupant complaints. A routine monitoring schedule can be developed according to the building's risks and needs.
Indoor air quality testing can identify elevated levels of selected pollutants or conditions that may warrant further investigation. The results can help facility teams review ventilation, filtration, pollutant sources and moisture management. Testing measures the parameters assessed at the time and locations sampled; it does not guarantee that an entire building is free from every air-quality concern.
Potential sources include outdoor pollution entering the building, inadequate ventilation, HVAC issues, emissions from paints and furnishings, cleaning products, particulate build-up and moisture-related mould growth. The likely sources vary by building and should be assessed in context.
Yes, multi-location testing can be arranged subject to service availability and the agreed scope. Share the number of sites, locations, required parameters and reporting needs so the team can confirm the available arrangements.
The report can include the measured parameters, results, units, sampling details and relevant comparison criteria, according to the agreed scope. Interpretation and recommendations may also be included where provided as part of the service. Confirm the report format and deliverables before booking.
Requirements depend on the building type, applicable regulations, workplace requirements and any certification scheme being pursued. Indoor air measurements may support workplace assessments or green-building documentation, but testing is not a universal legal requirement for every building. Confirm the criteria relevant to your specific project.
Indoor air quality testing assesses selected pollutants and conditions inside occupied spaces, where sources can include people, furnishings, cleaning products and ventilation systems. Outdoor air quality testing assesses ambient conditions outside the building. The parameters, sampling locations and comparison criteria may differ depending on the purpose of the assessment.
The cost depends on the number of locations, parameters, sampling or monitoring methods and reporting requirements. Share your building type and testing needs with the team to request a quotation.
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