TR19 Compliant Ventilation & Kitchen Extract Cleaning — Scotland-Wide
AHU Hygiene & Filter Maintenance in Scotland
Professional air handling unit cleaning and filter maintenance for commercial and healthcare premises across Scotland. Fully compliant with BESA TR/19, HTM 03-01, and L8 ACoP — with complete hygiene documentation on every job.
Why AHU Hygiene Matters
Air handling units are the lungs of your building. When AHU internals become contaminated with dust, mould, bacteria, and biological matter, that contamination is distributed throughout your ventilation system — affecting air quality, occupant health, and energy efficiency.
BESA TR/19 and HTM 03-01 set out clear standards for AHU hygiene in commercial and healthcare environments. Failure to maintain these standards can result in enforcement action, insurance disputes, and — in healthcare settings — serious infection control failures.
Deep Clean Scotland provides professional AHU hygiene and filter maintenance services across Scotland — with full compliance documentation aligned to BESA TR/19, HTM 03-01, COSHH 2002, and L8 ACoP issued on every job.
Compliance Standards We Work To
Ventilation Hygiene
The industry standard for internal cleanliness of ventilation systems — sets benchmarks for AHU hygiene and inspection frequency.
Healthcare Ventilation
NHS guidance for ventilation in healthcare premises — mandatory for hospitals, care homes, and clinical environments in Scotland.
Legionella Control
AHU drain trays are a known Legionella risk. Our cleaning and disinfection process is aligned to L8 ACoP to eliminate this risk.
What We Can Include in an AHU Service
Our AHU Hygiene Process
System Inspection
We carry out a full internal inspection of the AHU — recording contamination levels, filter condition, coil fouling, and drain tray status before any cleaning begins.
Internal Cleaning
All internal surfaces are cleaned using specialist equipment and COSHH-compliant biocidal agents — removing dust, grease, mould, and biological contamination throughout the unit.
Filter Service
Filters are inspected, cleaned, or replaced as required. We work with all filter grades from G4 to F9 and HEPA, and record pressure drop readings before and after service.
Documentation
A full hygiene report is issued on completion — including photographic evidence, pre and post-clean readings, and a compliance certificate aligned to BESA TR/19 and HTM 03-01.
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Frequently Asked Questions
What is AHU hygiene cleaning and why is it required?
Air handling unit (AHU) hygiene cleaning involves the removal of biological contamination, dust, and debris from all internal surfaces of the unit — including coils, fans, drain trays, and casing. It is required under the Health & Safety at Work Act 1974, Workplace Regulations 1992, and COSHH 2002 to maintain safe indoor air quality and prevent the spread of airborne pathogens.
How often should AHUs be cleaned?
BESA TR/19 recommends AHU hygiene inspection at least annually, with cleaning frequency determined by inspection findings and the system's risk classification. High-risk environments such as healthcare premises may require more frequent cleaning. We assess your system on the first visit and recommend a schedule based on contamination levels.
What legislation covers ventilation hygiene in Scotland?
The primary legislation is the Health & Safety at Work Act 1974, the Workplace (Health, Safety and Welfare) Regulations 1992, and the Control of Substances Hazardous to Health (COSHH) Regulations 2002. BESA TR/19 is the industry standard for ventilation hygiene. In healthcare settings, HTM 03-01 applies.
Do you provide documentation after AHU cleaning?
Yes. We issue a full hygiene report on every visit documenting inspection findings, contamination levels, cleaning carried out, and the outcome. The report is suitable for your insurer, HSE inspector, or facilities manager.
Can you clean AHUs in occupied buildings?
Yes. We plan all AHU cleaning to minimise disruption to building occupants. Where systems cannot be isolated during cleaning, we schedule work outside occupied hours. We carry out a risk assessment before every job.
Book Your AHU Hygiene Service
Find out if your air handling units meet BESA TR/19 and HTM 03-01 standards. Get a compliance check or request a quote today.