Kitchen ductwork and ventilation cleaning

Kitchen extract systems have an increased fire, odour, vermin and hygiene risk compared to general air supply and extract. This is due to the grease build up and general deposition of cooking oils acting as a potential ignition source. Kitchen extract cleaning is essential to minimise these risks, as stipulated by the Association of British Insurers (ABI) and the Health and Safety Executive (HSE).

Guardian’s kitchen extract cleaning services include regular testing to determine the frequency of cleaning required, dependent on system usage and the type and quantity of cooking. After initial kitchen ductwork and ventilation cleaning, Guardian will supply a ‘Certificate of Cleanliness’, followed up by a ‘Post-clean Verification Report’. This report is required as evidence of system cleanliness by the HSE, Environmental Health Officers and buildings insurance assessors, necessary for continued validation of an insurance policy.

Guardian Air Hygiene Post-clean Report:

  • Pre and post-clean photographic records of ventilation and ductwork cleaning
  • Pre and post-clean Wet Film Thickness Test (WFTT)
  • COSH data on any chemicals used
  • Recommendations for future cleaning requirements

Any inaccessible sections of the kitchen extract system need to be highlighted and presented accordingly within a comprehensive post clean report.

Guardian Air Hygiene carries out all kitchen ductwork and ventilation cleaning in accordance with the recommendations of:

  • HSE
  • ABI
  • Building Services Research & Information Association (BSRIA)
  • B&ES document TR19 – Internal Cleanliness of Ventilation Systems Guide to Good Practice (section 7).




All of our clients have access to GuardianCare, an online reporting system that enables works relating to a specific site to be viewed in real-time. No more waiting weeks for paperwork to arrive – all relevant documents, certificates, engineers’ work sheets or any other information can be viewed on-screen and printed instantly.