TR/19 Second Edition

Managing Ventilation Hygiene Risks

Presented by

Gary J Nicholls Co-author TR/19

Speaker – Gary J Nicholls

• Managing Director of Swiftclean (UK) Ltd, trading as Swiftclean Building Services

• Co-author of;– TR/17 first & second editions

– TR/19 first & second editions

• Steering Group Member producing;– FMS1 – BSRIA Ventilation Hygiene Specification &

Guidance

– RC44 – FPA Recommendations for fire risk assessment of catering extract ventilation

– TM26 – CIBSE hygienic maintenance of office ventilation ductwork

– BG 492013 – BSRIA commissioning air systems

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

• Summary

Key risks with poor ventilation hygiene

• 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

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

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

Define cleanliness quality classes

(TR/19 2013, BSEN15780, BG 2013)

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

tree

TR/19

New

System

Decision

Tree

New Ventilation System

Acceptable or not?

Objective measurement

Dust/contamination level testing

• Deposit

Thickness

Test (DTT)

• Preferred

Vacuum

Test (PVT)

Commission to TR/19

Maintain to TR/19

A suitable system of maintenance includes

Risk Assessment to TR/19

– Adequate access?

– Monitor/test conditions based on cleanliness

quality classes

Failure of

Duty

Adequate access?

Monitor/test conditions based on cleanliness

quality classes

Unacceptable contamination affectsQuality of air that we breath

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

“The Science of Compliance”