Improving Ventilation to Prevent Airborne Virus Transmission
The Problem
Airborne viruses pose a significant threat in enclosed spaces, as they can spread through respiratory droplets, aerosols, and indirect contact with contaminated surfaces. Poor ventilation allows these particles to linger in the air, increasing the risk of exposure and transmission. Today, we’ll focus on understanding how proper ventilation reduces these risks and discuss practical strategies to improve airflow and create safer spaces.
Identify the Hazards
- Aerosolised Particles: Tiny particles that remain suspended in the air for extended periods and can travel distances.
- Poor Air Circulation: Stagnant air increases the concentration of airborne particles, heightening the risk of infection.
- Improper Fan Placement: Fans used incorrectly can direct airborne particles toward others instead of away from them.
Safety Practices and Preventative Measures
1. Understanding Ventilation and Airflow
Why Ventilation Matters: Fresh air dilutes airborne infectious particles, reducing the chance of exposure. Poor airflow allows these particles to linger.
Effective Fan Placement:
- Avoid placing fans behind you that blow air toward others.
- Position fans to create a barrier of airflow across shared spaces, preventing particles from reaching others.
2. Outdoor Activities
Benefits of Being Outdoors:
- Open spaces naturally dilute airborne particles.
- Whenever possible, conduct activities outdoors to reduce the likelihood of transmission.
3. Improving Indoor Ventilation
Simple Steps:
- Open windows, doors, and other exterior openings when it’s safe to do so.
- Adjust ventilation systems to increase the intake of fresh air.
- Use ceiling, floor, or extractor fans to promote consistent airflow.
Cross-Ventilation Techniques:
- Place one fan to draw fresh air into the room from an open window or door.
- Use another fan to push air out through a different opening to maintain a steady air exchange.
4. Maximising Effectiveness
- Keep air moving consistently throughout the space.
- Regularly inspect ventilation systems to ensure they’re functioning correctly and providing adequate airflow.
Real-Life Case or Scenario
In one workplace, employees noticed poor airflow in a break room. The stagnant air led to multiple employees becoming unwell. By implementing cross-ventilation using two fans and adjusting the ventilation system to allow more fresh air, the business significantly improved air quality and reduced the spread of illness.
Employee Responsibilities
- Recognise and report areas with poor ventilation.
- Follow proper fan placement guidelines to avoid spreading airborne particles.
- Take proactive measures to enhance airflow, such as opening windows or doors when possible.
Employer Responsibilities
- Maintain and inspect ventilation systems to ensure proper airflow and fresh air intake.
- Provide guidance and equipment (like fans) to improve ventilation.
- Evaluate and address ventilation issues in enclosed or high-risk areas.
Discussion & Questions
- “What areas in our workplace have you noticed might need better ventilation?”
- “What steps can we take as a team to improve airflow and reduce risks?”
Encourage employees to share concerns or ideas to enhance ventilation practices.
Commitment/Action Plan
Let’s commit to identifying and improving ventilation in areas of concern. Starting today, assess your workspace for opportunities to enhance airflow and report any issues. Together, we can create safer environments for everyone.
Wrap-Up
Proper ventilation is a shared responsibility. By working together and implementing these strategies, we can significantly reduce the risk of airborne virus transmission. Thank you for making safety a priority.
Standards Overview
WorkSafe New Zealand supports proper ventilation as a means of reducing the risk of airborne transmission of infectious diseases.
Employers must ensure workplaces are adequately ventilated in accordance with the Health and Safety at Work Act 2015.
Improving airflow and ensuring sufficient fresh air circulation are key strategies to dilute airborne particles and minimise exposure.
Disclaimer
These toolbox talks are provided for informational and educational purposes only and are not a substitute for professional legal, health and safety, or regulatory advice.
The content reflects recognised best practices and general industry standards as at the date of publication. However, it may not be applicable to all workplace environments or specific operational contexts.
It is the responsibility of the Person Conducting a Business or Undertaking (PCBU), as well as officers, workers, and other duty holders under the Health and Safety at Work Act 2015 (HSWA), to ensure compliance with all relevant laws, regulations, and WorkSafe New Zealand guidance.
The authors, presenters, and distributors of this toolbox talk disclaim all liability for any loss, damage, or injury arising from the use or reliance on the information provided. Users should seek advice from a suitably qualified health and safety professional or legal advisor for guidance tailored to their specific circumstances.
Always follow your organisation’s policies, procedures, and safe work practices to manage risks and maintain a safe and healthy workplace.
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