Wet Film Thickness Testing
Why We Do It
Controlling deposits and monitoring their build up is essential to maintain hygiene standards and reduce fire risks in grease extract ventilation systems and should be considered a vital aspect of any ventilation system cleaning programme.
Wet Film Thickness Testing (WFTT) is a technique that is used to accurately assess the level of deposit build up within ventilation ductwork. This testing provides a reliable and quantitative way of measuring the degree of cleanliness of your ductwork, which in turn will help to determine when and how frequently cleaning is required in order to keep your ventilation system compliant.
How We Do It
A visual assessment is the main method to verify the cleanliness of an extract system. The surface of the system should be visually clean and able to meet the guidelines set out in the Building Engineering Services Association (BESA) Fire Risk Management of Grease Accumulation within Kitchen Extraction Systems TR19® Grease standards of cleanliness.
Once a visual assessment has taken place, Wet Film Thickness Testing further confirms and verifies that the TR19® Grease standards of cleanliness have been achieved post clean.
How We Can Help
To enquire or find out more about our Wet Film Thickness Testing services and how it can be applied as part of a planned preventative maintenance programme, our other services or to arrange a confidential FREE site survey and consultation without obligation, please contact us on 07429554141 or complete our Enquiry Form and we will contact you within 24 hours
Regulations
Health & Safety at Work Regulations
Health & Safety Relating to Air Quality
The following Health & Safety at Work regulations apply to air quality and require that effective provision should be made to ensure that every enclosed workplace is ventilated by a sufficient quantity of fresh or purified air.
Health & Safety at Work (1992): Where ventilation is provided by mechanical means the regulations require those mechanical ventilation systems to be maintained and cleaned as appropriate, to ensure efficient working order. Failure to carry out these duties is a breach of the regulations.
Regulation 5 of the Health & Safety at Work Regulations (1992) stipulates a duty to clean mechanical ventilation ‘as appropriate.’ The Workplace Regulations are accompanied by an Approved Code of Practice (ACoP) which gives guidance on how compliance with the regulations can be achieved.
- ACoP 22(A) States that regular maintenance (including inspection, testing, adjustment, lubrication and cleaning) should be carried out at regular intervals.
- ACoP 33 States: ‘Mechanical ventilation 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.’
Regulation 3 of the Health & Safety at Work Regulations (1999) imposes a duty on every employer to conduct a risk assessment. The testing procedure within HVCA TR/19 (Deposit Thickness Test – D.T.T./Vacuum Test – V.T.) assists in assessing some of the risks in relation to poorly maintained ventilation systems.
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