Ventilation System Services

At NIJHUIS DEBA we use the latest technology and procedures and employ only extensively trained and experienced personnel for the inspection and cleaning of ventilation systems, to ensure continuous and efficient operation.

Why do you need to inspect and/or clean HVAC/Duct Systems?

  • Legislation compliance
  • Part of an annual maintenance programme
  • Air quality complaints
  • System malfunction leading to performance reduction
  • Check system integrity
  • Risk assessment


The Workplace (Health, Safety and Welfare) Regulations 1992 impose a duty on employers to clean and maintain Mechanical Ventilation Systems. Ventilation duct cleaning must be carried out at least once every two years to fulfill legal requirements and to maintain a safe and healthy environment.

Ventilation System Services Include:

  • General ventilation cleaning
  • Cleaning and maintenance of air handling units
  • Ventilation risk assessment surveys
  • Cleaning and maintenance of Housing Association and private properties' ventilation systems
  • Fire damper checks, maintenance, remedial works and installation
  • Fire risk assessments of ventilation systems
  • Pre-commission cleaning
  • Local Exhaust Ventilation (LEV) maintenance and testing
  • Ventilation system remedial works
  • Kitchen extraction system¬†cleaning & maintenance
  • Environmental decontamination of clean rooms/computer suites
  • Operating theatre ventilation cleaning
  • Fume cupboard and systems safety cleaning, certification and removal
  • Supply and fit of filters
Air Handling Unit
Air Handling Unit

Ventilation Duct Systems need to be inspected and cleaned regularly as part of a planned maintenance routine to maintain system efficiency and integrity and safeguard against the following hazards:

  • Poorly maintained ventilation systems contribute to contaminated duct-work and poor air quality.
  • Filters and air handling units are a breeding ground for bacteria, moulds and fungus.
  • Accumulated dust and loose corrosion within duct-work systems reduces efficiency and has a long term impact on the integrity of the system.
  • Debris build-up within exhaust recirculating systems and general extracts increases the risk of fire.
Ventilation Extract Duct Before Cleaning in London
Ventilation Extract Duct Before Cleaning
Ventilation Extract Duct After Cleaning in London
Ventilation Extract Duct After Cleaning


Ventilation systems operated on by NIJHUIS DEBA technicians are cleaned and serviced for optimal performance. Comprehensive reports are produced upon completion of works.


NIJHUIS DEBA advisors and engineers are on hand to look after your Ventilation System requirements.