EC Cleaners Network · TR19® Air · General Ventilation Hygiene
Need to act on a ventilation hygiene report, indoor-air-quality concern, planned maintenance requirement or inspection of general air systems?
EC Cleaners Network helps facilities and estates teams organise the requirement, separate general ventilation hygiene from kitchen grease extraction and approach the appropriate independent specialist with a clearer system scope, access position and evidence requirement.
Already have a report, maintenance instruction or photographs?
Send the existing information with the enquiry. It can help identify whether the requirement concerns general ventilation hygiene, kitchen grease extraction, an access limitation, a mechanical problem or another specialist workstream.
First identify the type of problem
Is this really a TR19® Air ventilation-hygiene requirement?
The word ductwork is used across several different systems. Before anybody quotes for cleaning, identify what system is involved and what has triggered the requirement.
General ventilation hygiene
Supply air, general extract, AHUs, grilles, diffusers and associated ductwork may fall within a TR19® Air ventilation-hygiene requirement.
Grease-laden kitchen extraction
Commercial kitchen extract systems carrying cooking grease are addressed separately under TR19® Grease.
Kitchen extraction is not performing
Smoke, weak pull, heat, noise or fan shutdown can indicate a performance or mechanical issue rather than a general air-duct-cleaning requirement.
The system cannot be reached
Ceiling voids, risers, plant rooms, high-level ductwork and missing access provisions can change the job before cleanliness is even assessed.
When the symptom is poor kitchen performance
Cleaning is not the default answer to smoke, heat or weak extraction
HSE says effective catering ventilation should remove cooking fumes at source, remove excess hot air, provide replacement air, allow cleaning and maintenance, and operate without excessive noise or vibration.
Those are performance questions. If the main problem is what the kitchen is experiencing, use the symptom first rather than assuming that TR19® Air cleaning is the required service.
Weak pull
The fan appears to run but the canopy is not capturing as expected.
Smoke remains in the kitchen
Cooking fumes are escaping or taking too long to clear.
Kitchen is too hot
The extract is running but heat remains excessive.
Fan is noisy or vibrating
Mechanical noise or vibration should not be reduced to a hygiene-cleaning assumption.
Fan keeps cutting out
Intermittent operation can involve controls, electrical, overload or other technical issues.
Extraction has stopped
A complete failure needs the appropriate technical response rather than another cleaning instruction.
System scope
What can a TR19® Air ventilation-hygiene requirement involve?
General ventilation may include supply and extract ductwork, air-handling plant, fans, grilles, diffusers, plenums and other accessible airside components. A competent ventilation-hygiene specialist should establish which system is being assessed and which components fall within the agreed work.
Supply air systems
Ductwork and components distributing conditioned or outside air through the building.
General extract systems
Non-grease ventilation carrying air away from occupied or operational areas.
Air-handling plant
Accessible plant and associated airside components may need inspection or cleaning depending on the agreed scope and system condition.
Terminals, grilles and diffusers
Visible components should be related back to the correct ventilation system so inspection and evidence are not disconnected from the ductwork they serve.
Access points and high-level areas
Ceiling voids, plant rooms, risers and high-level ductwork can materially affect how work is planned and priced.
Inspection before cleaning
Cleaning should follow the condition of the system, not a generic assumption
TR19® Air provides a framework for assessing and managing the internal cleanliness of ventilation systems. The appointed ventilation-hygiene specialist remains responsible for the inspection method, condition findings and appropriate technical response for the system being considered.
Ask the contractor to identify the system, inspection locations, accessible and inaccessible areas, the basis for recommending cleaning and the evidence that will be returned afterwards.
- Identify the system. Know which AHU, supply route, extract route, zone or building area the report and quotation refer to.
- Record inspection locations. Findings are more useful when the reader can understand where observations or tests were made.
- Separate access from cleanliness. An inaccessible section is an access limitation, not proof that the section is either clean or contaminated.
- Agree the close-out method. State what post-work inspection, photographs, measurements or reporting are expected where relevant.
Current TR19® Air framework
What changed in the March 2026 TR19® Air specification?
BESA published the current TR19® Air specification in March 2026. It sets out best-practice standards for internal cleanliness and hygiene management of ventilation systems in commercial and public buildings.
BESA says the updated specification includes Vent Hygiene Register requirements, a new post-clean reporting section, changes reflecting the updated BS EN 15780 framework and information on ductwork sensors. Kitchen grease fire-risk management remains separately covered under TR19® Grease.
Before appointment
Make the inspection basis, system boundary and reporting requirement visible
Two contractors can appear to be quoting for air-duct cleaning while allowing for different systems, inspection work, access and evidence. The customer should be able to understand what is being priced before the work begins.
System identity
Which ventilation system, plant item, zone or air route the quotation covers.
Inspection basis
What findings, tests or observations support the proposed work and where they were obtained.
Access
Existing access points, plant-room restrictions, high-level work and any additional access required.
Competence
Relevant ventilation-hygiene capability, suitable insurance and applicable VHR Air status.
Evidence
Agreed post-work records, photographs, inspection results, exclusions and outstanding actions.
Vent Hygiene Register Air
Check current contractor status where VHR Air is relevant
BESA expanded the Vent Hygiene Register in 2026 to include an Air category for general ventilation work. Where VHR Air status is relevant to the requirement, check the contractor on the current official register before appointment.
Register status does not replace a clear scope. The organisation still needs to know which system is being assessed, what evidence supports the work and what will be returned after completion.
Close-out evidence
What should come back after ventilation-hygiene work?
The exact technical report is the contractor’s responsibility, but the organisation should be able to understand which system was worked on, what was inspected or cleaned, where evidence was obtained and what remains outside the completed scope.
System reference
The plant, duct route or zone to which the report relates.
Locations
Inspection, cleaning or test locations identified clearly enough to be understood later.
Evidence
Photographs and technical results where relevant to the agreed contractor scope.
Exclusions
Areas not accessed, not inspected or outside the instructed work stated clearly.
Further action
Any access, maintenance, investigation or reinspection still required.
TR19® Air and TR19® Grease
Keep general ventilation hygiene separate from kitchen grease extraction
TR19® Air addresses the internal cleanliness and hygiene management of general ventilation systems in commercial and public buildings. TR19® Grease is the separate BESA specification concerned with fire-risk management of grease accumulation in commercial kitchen extraction systems.
TR19® Grease
Grease-laden commercial kitchen extraction systems and associated fire-risk management.
Do not solve a terminology problem by pretending every duct-cleaning requirement is the same type of work.
Access and evidence
Ventilation hygiene has to work around the building, not just the duct
General ventilation systems can pass through plant rooms, ceiling voids, risers, public areas and high-level spaces. Building access, occupancy, operating restrictions and system identification can affect mobilisation as much as the cleanliness issue itself.
Historic EC Cleaners project imagery is used to illustrate ductwork and access context. It is not presented as evidence that the photographed system required TR19 Air cleaning.
Commercial and public buildings
Ventilation hygiene extends well beyond commercial kitchens
TR19® Air is relevant to general ventilation systems in a wide range of occupied buildings. The building use, occupants, access constraints, maintenance regime and evidence needs should shape how the requirement is prepared.
Several buildings or systems
Managing ventilation hygiene across a portfolio?
A multi-site organisation can standardise system naming, contractor requirements, evidence and exception reporting while keeping each building, ventilation system, access position and outstanding action separately identifiable.
TR19 Air ventilation hygiene: frequently asked questions
What is TR19 Air?
TR19 Air is BESA’s specification for the internal cleanliness and hygiene management of general ventilation systems in commercial and public buildings. The current edition was published in March 2026.
Is TR19 Air the same as TR19 Grease?
No. TR19 Air applies to general ventilation hygiene. TR19 Grease is the separate BESA specification for fire-risk management of grease accumulation within commercial kitchen extraction systems.
Does poor kitchen extraction mean the air ducts need cleaning?
Not automatically. Weak pull, smoke, heat, noise, fan shutdown or other performance symptoms can involve mechanical, control, replacement-air or ventilation issues that may need competent investigation rather than general air-duct cleaning.
Should general ventilation be inspected before it is cleaned?
The condition and system scope should be established before cleaning is assumed to be necessary. The appointed ventilation-hygiene specialist remains responsible for the inspection method, findings and technical recommendation.
What should the contractor report after ventilation-hygiene work?
The organisation should be able to identify the system, inspection or cleaning locations, relevant evidence, exclusions, inaccessible areas and any further actions that remain outside the completed scope.
Does the Vent Hygiene Register cover TR19 Air?
Yes. BESA expanded the Vent Hygiene Register in 2026 to include an Air category for general ventilation work, alongside the existing Grease category.
Need to turn a ventilation-hygiene requirement into a clear specialist brief?
Send the building details, what has triggered the requirement, any existing inspection information, known access problems and the timescale. EC can help organise the supplied information before appropriate independent ventilation-hygiene specialists are approached.
Responsibility statement:
EC Cleaners Network is operated by Search and Submit Ltd. Search and Submit Ltd does not inspect, clean, test, survey, design, remediate, certify or technically approve ventilation systems. Independent appointed contractors and competent professionals remain responsible for technical assessment, inspection, testing, safe working, quotations, physical delivery, reporting, certification and professional conclusions within their appointed scope.
TR19® Air and TR19® Grease are BESA specifications. References are descriptive and no BESA endorsement of or affiliation with EC Cleaners Network is claimed.