Independent Air Quality Consultants

Indoor air quality, environmental and ventilation hygiene.

01322 273158


UCV Verification & Servicing

Post-operative infection is proportional to the level of airborne contaminates within an operating room. To minimise infection risk, many procedures, e.g. in orthopaedic theatres, are carried out under an ultra-clean ventilated canopy (UCV). Regular verification, testing and servicing carried out by our experienced UCV specialists ensure the safe and efficient operation of your UCV system. Our system inspection assesses and verifies compliance to existing guidance (HTM 03-01). Should any part of the ventilation system, AHU, filters, ductwork, dampers, fans, speed controllers etc. show non-conformity, actions can be implemented in order to maintain the UCV’s ability to provide clean air and reduce infection risk.

Is UCV testing & service required?

Yes:- In order to follow good practice and OEM recommendations, as well as to meet the requirements of existing guidance (HTM 03-01), it is vital that your UCV system is subject to regular inspection, verification and service.

What is involved?

Preliminary Checks:

  • Magnehelic gauge readings (Pascals, mm wg or inches)
  • Fan run voltages (volts) and currents (amps)
  • Sound levels (dba)
  • Light levels (lux).

Service Tasks:

  • Cleaning intake grilles
  • Removing pre-filters and cleaning behind as required
  • Inspection of fan unit(s) for excess noise or vibration
  • Failing each fan unit and checking the fail system operates
  • Supplying and replacing UCV pre-filters
  • Lowering diffuser door to check the following:
    • physical condition of the terminal HEPA filters
    • tension of any fixings
    • any obvious signs of damage or filter bypass
    • inspecting the function of UCV theatre and remote panel’s switches and lamps
    • checking function of UCV lighting
    • reporting on the general condition of the equipment.

Performance Checks:

  • Recording of theatre temperatures under UCV and external to UCV.
  • Recording velocities under UCV in accordance with HTM guidance: i.e. 100 points at 2.0m ffl and 36 points at 1.0m ffl
  • Recording supply volumes / extract volumes to ucv canopy and/or whole theatre suite normally via the room diffusers and/or duct if easily accessible
  • Carrying out laser particle counting checks under the UCV (optional)
  • Carrying out microbiological air sampling (optional)
  • Recording differential pressures between theatre(s) and ancillary areas
  • Advising and reporting on any necessary rebalancing of supply / extract air.

How often does it need to be done?

HTM 03-01 guidance requires verification every 12 months. However, experience, good operational practices and OEM recommendations indicate that verification every 6 months is essential for maintaining optimal safe UCV theatre air quality.

How can AirisQ help with UCV compliance?

Our team of trained and qualified surveyors and engineers who are experienced with UCV systems will service, verify performance and take corrective actions via remedial works, to aid compliance with original design for all makes of UCV canopy systems.

An example of remediation would be:

Benefits of using AirisQ for your UCV testing

No loss of operating time

by optimising the performance of the canopy and prolonging HEPA filter life

Minimising infection risk

by optimising the performance and efficiency of the canopy and maintaining adequate wound site velocities

Compliance documentation

to satisfy infection control team and external auditors