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Ductwork cleaning record

An inspection and cleaning record for ventilation ductwork. Record the system, whether it is supply, extract or recirculation, and its cleanliness class, then the visual inspection result, the deposit test units and the readings before and after. Add each section cleaned with its length, method and before and after photos, and the form totals the length. Record access panels, filters, fire dampers, defects and the next inspection. Every question is listed below, and you can fill the live form in on this page.

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What is TR19 Air?

TR19 Air is BESA's specification for the internal cleanliness and hygiene management of general ventilation systems, released in April 2024. It starts with a visual inspection to decide whether cleaning is needed, sets minimum inspection frequencies by system type, risk and use, and uses deposit tests to show whether surfaces are within acceptable limits. BESA says inspections should not go beyond 12-month intervals for any system.

Last updated 17 October 2026. Facts checked by the SiteSurvey team on 17 October 2026 against BESA: duct cleaning best practice for TR19, BESA: ventilation hygiene standards (TR19) and regulation 5 of the Workplace (Health, Safety and Welfare) Regulations 1992 (maintenance).

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Every question in the ductwork cleaning template

A ventilation ductwork inspection and cleaning record (TR19 Air): system and hygiene grade, visual inspection, deposit tests before and after, sections cleaned, access panels, filters, fire dampers, photos and report. 3 sections and 45 questions. Follow-up questions and guidance appear only when an answer calls for them, so the person on site never sees the ones that do not apply.

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This is a starting point, not a fixed form. Once it is in your SiteSurvey account you can reword any question, add or remove questions, sections and answer options, and add your own logo, so it fits the way your team works and the jobs you do.

Details you only enter once

Add this form to a project in SiteSurvey and it fills in what the project already knows, so nobody on site retypes it and every form on the job uses the same names. Anything filled in can still be changed.

Project: the project name
Client: the project's customer
Site: the site, when the form is opened for a space or a product
Site address: the site address, from the space or the project

System

ProjectShort answer
Fills in from the project name
ClientShort answer
Fills in from the project's customer
Site*Short answer
Fills in from the site, when the form is opened for a space or a product
Site addressShort answer
Fills in from the site address, from the space or the project
Date*Date
TimeTime
Technician*Short answer
CompanyShort answer
System (AHU or fan reference and area served)*Short answer
SystemChoose one
- Supply
- Extract
- Recirculation
Cleanliness class (risk)Choose one
- High (for example laboratories, hospital treatment areas)
- Medium (for example offices, hotels, schools)
- Low (for example storage and technical rooms)
GuidanceBESA TR19 Air, released in April 2024, is the specification for the internal cleanliness of general ventilation systems. Inspection starts with a visual check of whether cleaning is needed, and deposit tests show whether surfaces are within acceptable limits. Regulation 5 of the Workplace Regulations 1992 requires mechanical ventilation systems in workplaces to be maintained, including cleaned as appropriate. The Workplace (Health, Safety and Welfare) Regulations 1992 require enclosed workplaces to be ventilated by a sufficient quantity of fresh or purified air (regulation 6), and mechanical ventilation systems to be maintained, including cleaned as appropriate (regulation 5).

Inspection and clean

Visual inspection resultChoose one
- Clean: no cleaning needed
- Cleaning needed
- Contaminated: specialist clean
Deposit test unitsChoose one
- Microns (deposit thickness test)
- g/m² (weight of dust)
Deposit test beforeNumber
Deposit test afterNumber
Acceptable limit for this system (same units)Number
From TR19 Air for this system and cleanliness class, or the specification.
Reduction (%)Worked out by the form
Shown only when the answers above make it relevant
Before cleaningWorked out by the form
Shown only when the answers above make it relevant
After cleaningWorked out by the form
Shown only when the answers above make it relevant
CheckThe deposit test after cleaning is still above the limit. Clean the section again and repeat the test before handing over.
Shown only when the answers above make it relevant
Sections cleaned
Repeat for each entry. Each one asks:
- Section or run*Short answer
- Length (m)Number
- Duct width (mm)Number
  Rectangular duct. With a tape, or measured from a photo with an A4 sheet taped to the duct.
- Duct height (mm)Number
- Internal surface area (m²)Worked out by the form
  Shown only when the answers above make it relevant
- MethodChoose one
  - Rotary brush
  - Compressed air
  - Hand clean
  - Vacuum
- Before photosPhotos
- After photosPhotos
Sections cleanedWorked out by the form
Total length cleaned (m)Worked out by the form
Internal surface area cleaned (m²)Worked out by the form
Access panels fitted or usedNumber
Filters changed or cleaned?Yes or No
Fire dampers checked and reset?Yes or No

Report

Defects (damaged ductwork, insulation, missing access, mould)Notes
Defects found
Repeat for each entry. Each one asks:
- Defect and action needed*Notes
- PriorityChoose one
  - Urgent
  - High
  - Medium
  - Low
- OwnerShort answer
- DueDate
- PhotosPhotos
Next inspection dueDate
Take the interval from the TR19 Air inspection frequency table for this system and cleanliness class.
Days to the next inspectionWorked out by the form
Shown when “Date” is answered and “Next inspection due” is answered
CheckThe next due date is before the date of this visit. Check the date.
Shown only when the answers above make it relevant
Site manager nameShort answer
Site manager signatureSignature
Completed by*Short answer
SignatureSignature

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Ductwork cleaning FAQs

How is cleanliness measured?

With deposit tests on representative internal surfaces before and after cleaning, measured as a deposit thickness in microns or as a weight of dust in g/m². Record the units and both readings so the improvement is clear.

What are the cleanliness classes?

BESA explains that TR19 Air aligns with the three classes in BS EN 15780: low (for example storage and technical rooms), medium (for example offices, hotels and schools) and high (for example laboratories and hospital treatment areas).

Is ductwork cleaning a legal duty?

Regulation 5 of the Workplace Regulations 1992 requires mechanical ventilation systems in workplaces to be maintained in an efficient state, including cleaned as appropriate. TR19 Air is the industry specification for how.

Is this for kitchen extract ductwork?

No. Kitchen extract systems follow TR19 Grease. Use the TR19 kitchen extract cleaning record for those.

Can I photograph each section?

Yes. BESA says before and after photos are part of TR19 evidence, and each section in the form has its own before and after photos.

Who uses this?

Ductwork cleaning and ventilation hygiene contractors, HVAC engineers and facilities managers.

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