Office Air Quality Testing
Independent indoor air quality assessors · Since 1999
Office air quality testing gives you objective evidence of the conditions staff and tenants work in. We measure what matters for your building and your question, explain what the results mean in plain terms, and give you a practical action plan.
Established 1999 · 2,500+ assessments · SafeContractor approved · BOHS Affiliate Member · London & South East
What we measure and why
Each parameter points to different causes and different next steps.
| Parameter | What it may indicate | Typical source or cause | What we assess next |
|---|---|---|---|
| CO₂ | Ventilation adequacy relative to occupancy | High occupancy, inadequate outdoor-air provision, controls | Ventilation operation, occupancy pattern, air distribution |
| PM2.5 / PM10 | Particle exposure and contamination pathway | Outdoors, cleaning, construction, printing, cooking, poor filtration | Source timing, filtration, ingress, cleaning and HVAC operation |
| TVOC | Chemical emissions or odour-related concerns | Fit-out materials, furnishings, cleaning products, stored chemicals | Targeted VOC analysis, source review, ventilation and control options |
| Temperature / RH | Thermal comfort, dampness risk and perceived air quality | HVAC controls, heat gains, poor zoning, weather, building fabric | Operational settings, distribution and longer-term monitoring |
| Formaldehyde | Specific aldehyde emissions | Furniture, panels, adhesives, finishes | Laboratory-confirmed testing and source control |
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Survey options
Four levels of survey cover most office situations.
| Survey | Best for | Typical scope |
|---|---|---|
| Basic screening | A quick check or a first look | Real-time spot measurements of core parameters at representative locations |
| Standard office survey | Routine assurance and tenant evidence | Real-time logging over a working period across floors, with benchmark comparison |
| Complaint investigation | Staff or tenant complaints | Targeted monitoring where problems are reported, plus ventilation review |
| Compliance / laboratory route | Certification, specifications or confirming a specific compound | Laboratory sampling for formaldehyde and VOCs alongside real-time monitoring |
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Example action plan
Every report ends with prioritised actions. A typical plan looks like this:
Quick operational fixes
Adjust ventilation run times or set points where CO₂ rises with occupancy.
Source control
Change cleaning products or storage where TVOC peaks match their use.
Maintenance
Check filters and outdoor-air dampers where particulates track outdoor levels.
Further investigation
Commission a ventilation hygiene assessment if dust or odours point to the ductwork.
Verify
Re-test after changes to confirm improvement.
Limitations and what this assessment cannot tell you
- Results reflect conditions during the survey period
- Spot measurements capture a moment; logging captures patterns
- Real-time VOC sensors screen for total VOCs and do not identify individual compounds
- Our assessments focus on the physical indoor environment and its impact on general occupant comfort.
What your report includes
- Scope, floors and locations surveyed
- Results for each parameter with benchmark comparison
- Graphs of how conditions changed through the day
- Plain-English interpretation
- Prioritised action plan
- Re-test recommendation
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Frequently Asked Questions
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Need Indoor Air Quality Testing?
Get a no-obligation quote. We provide IAQ testing, ventilation assessment and environmental monitoring across London and the South East.