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


Our other 3 companies within the RJ Urmson Group are:

Urmson LLP
Core business activities are commissioning, survey, monitoring, independent witnessing testing and validation of HVAC, water systems including seasonal commissioning

National Hygiene Services Limited
Core business activities are maintenance, survey, testing and treatment of commercial and domestic water systems including chlorination and legionella risk assessments

RJ Urmson Fire Specialists Limited
Core business activities are maintenance and service, survey, testing of fire systems including fire damper testing, fire compartmentation surveys and fire door inspections


  • Over 27 years of satisfied customers
  • Always have a personal point of contact
  • Full on-site service management
  • Bespoke service suited to your requirements
  • Ethical employers
  • National coverage
  • £10m Public, Products and Employer Liability Insurances
  • Nationally accredited Quality Management (ISO 9001)
  • We have an environmentally friendly approach to our services, in line with ISO 14001
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