TR/19 Second EditionManaging Ventilation Hygiene Risks

Presented byGary J Nicholls Co-author TR/19

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

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

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 SystemAcceptable or not?

Objective measurementDust/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