What Are VOCs?
Volatile Organic Compounds are a broad group of carbon-based chemicals that evaporate at room temperature. In office environments, the most common sources include:
- New furniture, carpets, and flooring (off-gassing)
- Paints, adhesives, and sealants from fit-out works
- Cleaning products and air fresheners
- Printers and photocopiers
- Personal care products
Formaldehyde: A Specific Concern
Formaldehyde is a particularly significant VOC because of its prevalence in building materials (MDF, plywood, insulation) and its well-documented health effects. Even at low concentrations, formaldehyde can cause eye irritation, respiratory discomfort, and headaches. The WHO indoor air quality guideline is 0.1 mg/m³ (30-minute average).
When to Test
VOC and formaldehyde testing is recommended in several scenarios:
- Post fit-out or refurbishment — before occupants return
- Occupant complaints of irritation, odours, or headaches
- BREEAM or WELL certification requirements
- Pre-occupancy baseline assessment for new leases
- Ongoing monitoring as part of IAQ assurance programmes
Testing Methodology
Green Air Monitoring uses calibrated direct-reading instruments and laboratory-analysed samples to provide accurate, defensible results. Testing is benchmarked against HSE EH40 workplace exposure limits, WHO guidelines, and BREEAM/WELL thresholds as appropriate.