Changes to TR19

1. TR/19 Second Edition
Managing Ventilation Hygiene Risks
Presented by
Gary J Nicholls Co-author TR/19

2. Agenda
• What the law requires
• Key ventilation system risks – hygiene related
• What TR/19 is
• System cleanliness quality classes
• A suitable system to manage ventilation
system hygiene

3. Poor ventilation hygiene - key risks
• Fire and the spread of fire
– Forensic fire investigators state 25% significantly
worst
• Reduces efficiency – higher energy spend
– Heat transfer and fan energy requirements
• Quality of air that we breathe
– Duct 10% of floor area

4. Regulations are Laws approved by
Parliament
• Management of Health and Safety at Work
Regulations
– duty of care on every employer to conduct a risk
assessment
• Workplace (Health, Safety & Welfare)
Regulations (L24 second edition 2013)
- Regulation 5 imposes a duty to clean
ventilation systems “as appropriate“ and ensure
they are subject to a suitable system of
maintenance
- Regulation 6 require building owners and
managers to ensure that enclosed workplaces are
ventilated with fresh and purified air

5. What is TR/19?
• Industry - Guide To Good Practice
• Subject - Internal Cleanliness of Ventilation Systems
• Written by Industry experts/practitioners, developed/improved
over past 23 years
• Latest version published by B&ES in July 2014
• Publishing history
– DW/TM2 1991 – guidance on protection against dust egress into
ductwork during construction
– TR/17 1998 introduced for the first time in the UK good practice guidance
testing/verification
– TR/17 Second Edition 2002 more detailed guidance for kitchen extract
systems
– TR/19 2005 – added a revised version of TM2 for
– TR/19 Second Edition 2013, incorporates philosophy of BSEN15780, new
system verification & improved kitchen extract fire safety

6. Define cleanliness quality classes
(TR/19 2013, BSEN15780, BG 2013)

7. Ensuring new ventilation system
cleanliness
• Construction site dusty environment
• Chimney effect
• Affectivity of protection measures
• Dust ingress inevitability
• Miles on the clock!
• Inspect & as required test to quality class
• Pre-commission clean/test/handover

8. tree
TR/19
New
System
Decision
Tree

9. New Ventilation System
Acceptable or not?

10. Objective measurement
Dust/contamination level testing
• Deposit Thickness Test (DTT)
• Preferred Vacuum Test (PVT)

11. Commission to TR/19
Maintain to TR/19

12. A suitable system of maintenance
includes
Risk Assessment to TR/19
– Adequate access?
– Monitor/test conditions based on cleanliness
quality classes

13. Failure
of
Duty

14. Adequate access?

15. Monitor/test conditions based on
cleanliness quality classes

16. Unacceptable contamination affects
Quality of air that we breath

17. Follow TR/19 guidance for suitable
ventilation hygiene control
• Cleanliness quality classes
• Adequate access for inspection/testing/cleaning
• Cleanliness of newly installed ventilation systems
• Implement a management system to control risks
with periodic inspection and testing
• Testing fire damper function
• Cleaning as appropriate
• Log book/record keeping to evidence
• A suitable system of maintenance
• Compliant duty fulfilled