Ventilation Ductwork Cleaning and Maintenance

Ensure your Ventilation System Cleaning is Compliant

The Importance of Ventilation Ductwork Cleaning

Dirt, dust, and debris are no strangers to industrial Heating, Ventilation and Air Conditioning (HVAC) systems – and when they build up in those systems, they can interfere not only with the efficiency and  workload of the HVAC system, but also impacts the indoor air quality. This can be both costly to the plantand associated HVAC system as well as the business and individual.

The ventilation system can be home to:
– Particulates – Mixture of solids drifting in the air, consisting of dust, dander (skin flakes), soot, pollen and smoke particles.
– Microbes – Bacteria, viruses, fungi, spores and mold.
– Gases/Odours – Indoor gases release from furniture, carpets, cleaning chemicals, insulation etc.

Poor air quality can cause a reduction in productivity and a rise in absenteeism resulting in a cost to the business in poor productivity and lost days at work.

Hands Face Space Ventilation Coronavirus

Coronavirus Ventilation Tips

  • Natural ventilation where possible, open windows where safe to do so. 
  • Increase percentage of fresh air turning AHU’s and fans up to 100%. 
  • Increase total airflow supply to occupied spaces where possible.
  • Ensure the system is balanced to achieve even distribution throughout the building.
  • Disable demand-control ventilation controls that reduce air supply based on temperature or occupancy.
  • Improve central air filtration.
  • Increase air filtration to as high as possible without significantly decreasingly design airflow.
  • Inspect filter housing and racks to ensure appropriate filter fit and check for ways to minimize filter bypass.
  • Ensure that all grilles are free from blocked and heavy contamination to ensure they are working too 
  • Keep toilet extract systems on 24/7 or at least operating at full capacity when the building is occupied.

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Sample Ventilation Hygiene Report



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Sick Building Syndrome (SBS)

Sick Building Syndrome (SBS) is a condition in which people in the building suffer from symptoms resulting physical or environmental factors such as ventilation, workplace layout etc. 

Common Symptoms

  • headaches
  • blocked or runny nose
  • dry, itchy skin
  • dry, sore eyes or throat
  • cough or wheezing
  • rashes
  • tiredness and difficulty concentrating

The best way to combat the effects of these foreign materials and particulates is to invest in professional and thorough HVAC systems Ventilation Ductwork cleaning from Hydro-X Air. Hydro-X Air Ltd can certify that the above areas have been cleaned in accordance with the BESA TR19 Guideline – Internal Cleanliness of Ventilation Systems. We also offer Ventilation Annual Hygiene Risk Assessment and Indoor Air Quality Assessments.

Before & After Image Examples Hydro-X Air have cleaned and certified to BESA TR19 Guideline – Internal Cleanliness of Ventilation Systems

Legislation – Health and Safety Law

The Management of Health & Safety at Work Regulations 1999 impose a duty on every employer to make a suitable and sufficient assessment of:

  1. the risks to the health and safety of his employees to which they are exposed whilst they are at work, and
  2. the risks to the health and safety of persons not in his employment arising out of or in connection with the conduct by him of his undertaking.

Regulation 5 of the Workplace (Health, Safety and Welfare) Regulations 1992 imposes a duty to clean mechanical ventilation systems “as appropriate”. Regulation 6 states, “effective and suitable provision shall be made to ensure that every enclosed workplace is ventilated by a sufficient quantity of fresh or purified air”.

ACOP6 (52) relating to Regulation 6 of the Workplace (Health, Safety and Welfare) Regulations, 1992 states that “mechanical ventilation systems (including air conditioning systems) should be regularly and properly cleaned, tested and maintained to ensure that they are kept clean and free from anything which may contaminate the air”.

British Standard BS EN 15780 provides benchmarks to define cleanliness and dirtiness.

Additional Useful Links

Importance of ventilation to reduce spread of COVID-19

Ventilation and air conditioning during the coronavirus (COVID-19) pandemic

Coronavirus disease (COVID-19): Ventilation and air conditioning in public spaces and buildings


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