Trusted since 1999 · 80+ organisations served
Experience & Client Portfolio
Trusted by leading organisations across the UK
27
Years of proven delivery
2,500+
Assessments completed
80+
Client organisations
8
Sectors served
Client Portfolio
We work across every major sector — from national FM providers and property estates to engineering firms, healthcare, and education. Here is a selection of the organisations we are proud to serve.
Facilities Management
16 clients
Property & Estates
10 clients
Engineering & Construction
13 clients
Transport & Industrial
9 clients
Retail & Hospitality
6 clients
Professional Services
11 clients
Education & Community
6 clients
Healthcare & Specialist
6 clients
Project Examples
Representative examples of the work we deliver — consistent, reliable, and repeatable across sectors.
Ongoing IAQ Assurance — Major FM Portfolio
Multi-year IAQ and ventilation assurance programme across a national FM portfolio. Quarterly assessments, trend reporting, and priority reactive response — delivering consistent compliance evidence and reduced occupant complaints.
Airport Terminal IAQ Baseline
Pre-occupation IAQ baseline assessment for a refurbished terminal building at London City Airport. Verified BREEAM compliance and established ongoing monitoring recommendations.
Retail Flagship — Ventilation Hygiene
TR19-aligned ductwork cleanliness assessment and ventilation performance review for a flagship retail environment. Identified remediation priorities and established annual verification schedule.
Laboratory LEV Compliance
LEV testing and fume cupboard face velocity assessment across 40+ extraction points. Identified non-compliant systems and supported remediation programme.
Commercial Office Mould Investigation
Investigated persistent mould complaints in a multi-let office building. Environmental monitoring, air sampling, and moisture mapping identified building fabric defects and inadequate ventilation as root causes.
Heritage Building Environmental Monitoring
Long-term environmental monitoring programme for a heritage property — temperature, humidity, and particulate tracking to protect sensitive collections and occupant comfort.
What Our Clients Say
Long-standing partnerships built on reliable, consistent delivery.
"Green Air Monitoring have supported me for over 10 years. John Harbud and his team provide a first class service, with consistently thorough site surveys, extremely detailed reporting, and professional guidance that is clear and actionable. Their knowledge and expertise gives complete confidence and I would not hesitate to recommend them."
Gary Hance
United Facilities Management
"Green Air Monitoring provides great reports post service for clients to review and understand their working environment."
Miles Dunson, Tenant Contract Supervisor
CBRE Global Workplace Solutions
"I've worked with Green Air Monitoring for many years due to their organised and committed approach with in-depth reporting. Very responsive with great communication and always happy to assist in any requests. Booking in service visits ahead of time enabling us to operate in an organised manner, all very smooth."
Vince Neal
Hemlow Ltd
"Following researching several companies we decided to employ the services of Green Air Monitoring, a decision we have never regretted. The detailed reports they provided have given peace of mind to senior management and staff. One of the major plus points is the consistency of staff we deal with and who have a full working understanding of the site and our requirements."
Martin Walsh, Facility Manager UK
Viaplay Group
"Green Air Monitoring has been a pleasure to work with. They are proactive and efficient and consistently respond quickly. Communication is always quick and clear. It's reassuring to work with a company that is so reliable."
Hayley Webb, Contracts Administrator
KCE FM Limited
"I have always found the staff at Green Air very helpful and efficient when organising our annual inspections. The inspector always explains the process he is carrying out and is extremely knowledgeable. They produce reports detailing the results and any recommendations, always sent in a timely manner. I would thoroughly recommend Green Air Monitoring."
Becky Edwards
Serco Limited
"I've been very happy with the service provided by Green Air Monitoring. The communication is clear and timely, and everything is handled professionally and efficiently. The team are helpful, reliable, and easy to work with, and I wouldn't hesitate to recommend their services to others!"
Sian Vamplew, Contract Administrator
Edmund Services
"The team has been professional, responsive, and reliable throughout, delivering work to a good standard and within agreed timelines. Communication has been clear and issues, if any, were handled promptly. We rate the service positively and would be happy to work with Green Air Monitoring again."
Aaket Panchal, Contract Support Administrator
Planned Technical Services
Why Clients Stay
Our average FM client tenure is 10–20 years. That longevity reflects what we consistently deliver:
Related Dust Monitoring Services
Need Indoor Air Quality Testing?
Get a no-obligation quote. We provide IAQ testing, ventilation assessment, and environmental monitoring services across the UK.