TR19 Compliant Ventilation & Kitchen Extract Cleaning — Scotland-Wide
Commercial Ventilation Cleaning in Scotland
Professional ventilation system hygiene for commercial premises across Scotland. We remove bacteria, mould, dust, and contaminants — improving air quality, reducing health risks, and keeping your system compliant.
The Health of Your Building Starts With Its Air
General ventilation systems — supply air, extract air, and recirculation units — are responsible for the air quality experienced by everyone inside your building. Over time, ductwork and system components accumulate dust, bacteria, mould spores, and airborne contaminants. Left unaddressed, these build-ups are distributed throughout occupied spaces with every air change.
The consequences are not just compliance-related. Poor ventilation hygiene contributes to increased sick days, respiratory irritation, allergic reactions, and a general decline in the working environment. In healthcare and education settings, the risks to vulnerable occupants are more significant still.
Under TR19, ventilation systems are classified by type and usage — and cleaning or inspection frequency is determined by that classification. Not every system requires the same intervention, and not every visit will result in a clean. Our approach is to inspect and test first, and only clean where the data supports it.
Deep Clean Scotland provides professional ventilation hygiene services across Scotland — with visual inspection, Preferred Vacuum Testing (PVT) where applicable, and full compliance documentation on every visit.
What We Can Include
Our Process
System Inspection & Assessment
We begin with a full visual inspection of your ventilation system — supply and extract — assessing contamination levels against the system's TR19 classification. Visual inspection alone may be sufficient to determine the system's hygiene status. Where a more objective measurement is required, Preferred Vacuum Testing (PVT) — also known as European Vacuum Testing — is carried out to quantify ductwork cleanliness. Results from both methods are assessed together to determine whether cleaning is necessary.
Ventilation Cleaning
Where visual inspection or PVT results indicate cleaning is required, we use specialist equipment to clean all accessible ductwork, fan units, and terminals — removing bacteria, mould, dust, and contaminants throughout the system.
Post-Clean Verification
Following cleaning, post-clean visual inspection and PVT measurements are taken to verify the system now meets the required cleanliness standard for its classification. Before-and-after results are recorded and included in your compliance documentation.
Report & Certification
A full hygiene report is issued on completion — documenting visual inspection findings, PVT test results where carried out, system classification, and the outcome: compliant without cleaning, or cleaned and verified. All documentation is ready for your insurer, EHO, or facilities manager.
Our Services
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Frequently Asked Questions
What is TR19 ventilation cleaning?
TR19 is the BESA (Building Engineering Services Association) standard for the hygiene of ventilation systems. It defines cleanliness benchmarks for ductwork and sets out inspection and cleaning requirements. TR19 ventilation cleaning involves inspecting the system, measuring contamination levels, cleaning where required, and issuing a compliance report documenting the outcome.
How often does ventilation ductwork need to be cleaned?
TR19 specifies cleaning frequency based on the system's risk classification — determined by the type of air handled and the environment. General office ventilation is typically inspected annually. Higher-risk environments such as healthcare, food production, and laboratories may require more frequent inspection and cleaning. We assess your system and recommend a schedule on the first visit.
What is Preferred Vacuum Testing (PVT)?
Preferred Vacuum Testing (PVT), also known as European Vacuum Testing, is an objective method for measuring the cleanliness of ductwork. A vacuum is applied to a measured area of duct surface and the collected debris is weighed. The result is compared to TR19 benchmark levels to determine whether the system is clean or requires cleaning. PVT provides a quantifiable, auditable record of ductwork cleanliness.
Is ventilation cleaning a legal requirement?
Yes. Employers have a legal duty under the Health & Safety at Work Act 1974 and the Workplace (Health, Safety and Welfare) Regulations 1992 to maintain ventilation systems in a clean and efficient condition. COSHH 2002 also requires that ventilation systems used to control hazardous substances are maintained and inspected. Failure to comply can result in HSE enforcement action.
Do you clean new ductwork before occupation?
Yes. BESA TR/19 recommends post-build cleaning of all new ductwork prior to occupation to remove construction debris, dust, and contamination introduced during installation. We carry out post-build cleans and issue a TR19 compliance report confirming the system is clean and ready for use.
Arrange Your Survey
Find out if your ventilation system meets compliance requirements. Site survey — no obligation.