AIR CONDITIONING OPERATING THEATRES
can minimise the level of energy required for the heating system by re-using warm air extracted from the operating theatre via the ventilation system. Another of our recent installations also incorporated invertor speed controls within the ventilation plant to ensure that there is finite control to each fan. This system is connected to a site-wide building management system, ensuring the maintenance teams are instantly alerted in the event of any loss of efficiency.
Ventilation systems for standard procedure operating theatres must deliver a minimum of 25 air changes per hour
The medical team must have real-time status information about the ventilation and heating system, so that measures can be taken to alter the settings if required
that the temperature controls are both accessible to the surgeon and can manipulate the temperature accurately to the exact needs of each operation. The system must be capable of responding without delay to any change in the settings. It is also essential that the medical team
has real-time status information about the ventilation and heating system in the operating theatre, so that measures can be taken to alter the settings if required. The surgeon’s panel display should include temperature information, ventilation system status and humidity levels, in addition to information about the status of equipment. A best-practice approach to air quality and temperature in operating theatres takes into account not only a hospital’s clinical needs but also its operational requirements. By designing in heat recovery via a heat plate exchanger, the building services specialist
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62 CIBSE Journal March 2014
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The big picture In any environment, the building services installation should be designed in such a way that the site programme is minimised and the most efficient use is made of the available space. In an operating theatre this is even more vital, as the handover date for the project is business critical and the complex network of services and equipment that needs to be installed means that space is at a premium. The installation must also take account of maintenance regimes and access for any repair work, as well as future flexibility – there has to be scope for the space to be further upgraded to take account of advances in technology or new legislative stipulations. But the complexity of providing a sophisticated heating and ventilation system for a specialist environment should not be used as the excuse for over-complicated installations. There is a real imperative to keep the installation as simple in design layout as it is detailed in terms of accuracy, resilience and HTM compliance. In an operating theatre, air quality is an essential component in achieving successful outcomes, and only by taking a pragmatic and holistic approach can the building services engineer really deliver that important role. CJ
STEVE HUNT is managing director of building services engineering specialist Steven Hunt Associates
www.sav-systems.com
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