Simon Witts, M.AIRAH
A director at VA Sciences, Simon Witts has more than 34 years’ international experience in the master-planning, sustainable design, engineering design, project management, project review and independent sign-off of a wide range of mechanical building services in a multidisciplinary environment.
He has specialist design experience in healthcare, laboratory, and education building design. Witts is the co-author and editor of the current Victorian Design Guidelines for Hospitals and Day Procedure Centres prepared for the Department of Health and is a peer reviewer of the AIRAH Technical Handbook.
Articles by Simon Witts, M.AIRAH

Computational fluid dynamics modelling of ventilation in road tunnels: enhancing air quality and safety
Ventilation units within vehicle tunnels play a pivotal role in ensuring safety and optimal air quality for occupants. These units are used to assist with propelling air from one end to the opposite end of the tunnel. Computational fluid dynamics (CFD) has emerged as an invaluable design tool for engineers and stakeholders, offering simulated insights and data to optimise safety and efficiency in tunnel projects. This paper emphasises the advantages of CFD for road tunnel ventilation design, showcases a case study involving impulse fans, and highlights the positive effects on project costs and overall tunnel ventilation performance.

Striking a balance: planning and implementation considerations for natural gas removal in hospitals
This paper examines the challenges associated with removing natural gas from hospitals and transitioning to all-electric systems. It emphasises the unique energy requirements of hospitals and the need to prioritise patient care and safety over energy efficiency.

Code green
Hospitals aren’t just another building; they are a processing facility in which lives are being saved daily – this requires reliability and energy. So, can we please stop bundling them in with other building types when it comes to talking about green buildings? James Moyes, Simon Witts, M.AIRAH, and Broden Kay are asking this pointed question.
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See everything from the latest edition of Ecolibrium, AIRAH’s official journal.