Ventilation Hygiene and Indoor Air Quality Assessments

Hydro-X Air has designed a fully comprehensive inspection report in line with BS 15780 ventilation for buildings and B&ES TR19 internal cleanliness of ventilation systems.

Our inspection assessment will help prevent workplace issues such as dryness of eyes, nose and throat, tiredness and general complaints of feeling unwell due to the long-term exposure to a contaminated working environment.

We would strongly recommend that regular inspections of the ventilation building plant and ductwork services are carried out to identify any potential risks of contamination. Such contamination may have accumulated to a degree which could be detrimental to both the building users and processes being undertaken with the building.

The scope of a ventilation hygiene assessment should include as a minimum:

  • Provision of suitable quick-release DW144 access panels.
  • Visual inspection, which would consist of photographic and video evidence.
  • Quantitative duct surface measurements by an approved method, generally this is via deposit thickness test (DTT) although this method is not ideal for spiral ductwork so a wet firm thickness test method (WFTT) would be used in this circumstance. A specific representative number of tests should be agreed before the start of any assessment taking place. An average should be calculated across all tests conducted on each system and used to determine whether it is appropriate to clean the system.

The following components should be subject to cleanliness inspection as a minimum:

  • Fresh air intakes, air handling units including filter, coil and fan chambers.
  • A selection of ductwork, including changes of direction, terminations, straight and vertical ducts.
  • A variety of terminal equipment such as flexible ducts, grilles, diffusers and equipment such as induction/fan coil units.

The inspection of maintenance records should be kept and include as a minimum:

  • Introduction
  • Executive summary
  • Details of findings and photographic evidence
  • Recommendations

The scope of an indoor air quality assessment should consist of as a minimum:

  • Air temperature
  • Relative Humidity
  • Carbon Monoxide
  • Carbon Dioxide
  • Airborne Microbiological testing
  • Airborne Particulate levels

If you have any questions on your ductwork or ventilation systems or are not sure what you need to do to maintain safe, clean and efficient systems, do not hesitate to contact us.

> Enquire about our Ventilation Hygiene & Indoor Air Quality Assessments
> View our other Air Hygiene services


Talk to us today about your air hygiene requirements

We work in a variety of industries



Facilities Management

Government Buildings