01257 262 683




Monday – Friday 08:00 – 17:00


RJ Urmson Commissioning Engineers Ltd is part of the RJ Urmson Group. Our core business activities are operating theatre and critical ventilation verification’s and testing of LEVs, fume cupboards and biological safety cabinets.

We offer a level of expertise that benefits a vast range of sectors including NHS, private healthcare, operating theatres, education, pharmaceuticals, retail, manufacturing, commercial and residential buildings.

Furthermore, we also carry out mechanical and electrical design reviews, deliver turnkey and clerk of works projects for the building services sector.

We are recruiting! Take a look at our latest career opportunities



Whatever your ventilation service requirements are – design reviews, turnkey projects, testing, cleaning, surveys, installations, maintenance and verifications of ventilation systems and operating theatres – contact us on 01257 262 683 to see how we can assist you or click below for further details:


Verifications service is designed for any type of ventilation system, old and new. Final reports detail all findings and evaluates each system taking into account design data, compliance with HTM 03-01 and client specified targets

Design Reviews

Our design team review HVAC designs – new and old – and assist in making decisions regarding plant and suite to ensure that the system meets current guidelines

Turnkey Projects

We provide an accurate interpretation of our client’s requirements – design and costing manufacture and equipment procurement for turnkey ventilation projects to the healthcare, pharmaceutical, commercial and manufacturing sectors

Clerk of Works

Clerk of works service is designed to represent the interests of the client in regard to ensuring the quality of works they are undertaking are in accordance with the design information, specification and engineering drawings to recognised standards

Ventilation Testing

Certified engineers carry out thousands of ventilation tests annually across the country, including verifications, HEPA filter integrity (DOP), fume cupboards, LEVs, MSCs, isolators, containment booths, downflow benches and more…


All our engineers are comprehensively trained in the correct handling and installation of air filters and fan motors and have a key understanding of industry segments, critical applications including HEPA filters with DOP testing

Ventilation Maintenance

A ventilation system is one of the most sensitive systems in the building, maintenance is crucial to ensure it is functioning within safe parameters. Our maintenance services are carried out to current standards and guidelines

Cleaning of Ventilation Systems

Ventilation ductwork and equipment overtime will eventually become dirty; this means that the air may be contaminated with all manner of dirt and bacteria. Our services include cleaning of fans and grilles, kitchen extracts and ventilation ductwork

Ventilation Issues & Remedials

Are you experiencing ventilation issues and problems? Plant no longer performing as it was designed to? Such as blocked vents / ductwork, clogged filters, ductwork leakage, thermostatic and humidity issues etc. visit our problems solving page for solutions



“I have had a good working relationship with RJ Urmson Group over the past 7 years whilst working at North Lincolnshire and Goole Hospitals NHS Foundation Trust and Doncaster and Bassetlaw Teaching Hospitals NHS Foundation Trust. They hold maintenance and service contracts for theatre ventilation including verification of ultra clean systems and smoke damper survey and testing. I find them very flexible in their approach, working with agreed times to avoid any disruption to services. Supplying comprehensive reports that are easy to read with detailed feedback on identified issues helps us to target spend on areas before serious problems occur”

R Holdridge, Head of Operational Estate, BDGH | Doncaster and Bassetlaw Teaching Hospitals NHS Foundation Trust

“ADT Energy has taken great pleasure in contracting RJ Urmson Group in a number of applications of varying sizes. RJ Urmson Group have been very accommodating with all of ADT’s requirements and requests. Detailed certification and documentation for works carried out have always been issued promptly. Their engineers have always conducted themselves in a friendly and professional manor and their workmanship is of the highest standard. I would happily recommend RJ Urmson Group to any potential client requiring their services”

James Roxburgh , Project Manager | ADT Energy

“Due to programme constraints, a number of other factors it were always going to be a challenging project, and it’s been a huge achievement to get to where we are at. Kirk and his guys came into a pressurised situation but still managed to put in as much effort as possible and carried out their works to an extremely high standard which was also noticed by the clients’ consultant when the witnessing was carried out without any issues. Arthur McKay & ISG really appreciate the efforts Urmson LLP put in, as it helped push the job across the line”

Martin Kerr, Project Manager | Arthur McKay Building Support Services


Fire Door Engineer

August 20th, 2019|

We, Urmson Fire Specialists Ltd (USF) is seeking an experienced Fire Door Engineer based within the London or the surrounding regions. Your daily duties will be carrying out fire door inspection and minor repairs. We require a minimum of 3 years’ experience in the fire door business, ideally with qualifications such as FSIDip, SSSTS, NVQ Level 2 Passive Fire Protection, FIRAS, and FDIS. See post for full job spec and how to apply.

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