HEALTHCARE ESTATES 2021 CONFERENCE
He expanded: “So, you will find, scattered throughout, little blue boxes with little aide-memoires, which highlight why the preceding paragraph is important, particularly in a healthcare setting. They are very sound ideas, so please don’t depart from them.”
Left: In 1972 Dr Owen Lidwell led a Joint Working Party on ventilation and operating suites, which was to be ‘the foundation of all the guidance that has emerged since’. Centre: Following Owen Lidwell’s work, the Department of Health and Social Security – as it was then – set up a working group and codified the ventilation of operating departments in a document called DV4. Right: On ‘coming on board’ with official ventilation guidance, Malcolm Thomas was asked to update DV4, but soon after doing so, he was told it was now to be an HTM, and HTM 2025 was duly published in 1994.
Taking advantage of new technology
He continued: “On carbon reduction, we changed quite a few things to try to get maximum benefit from new technology and reduced energy use – fans being a good example.” He elaborated: “Those of us who grew up with belt-drive fans know we were stuck with a particular fan speed, regardless of whether it was optimal, and with specific outputs; there wasn’t much you could easily do about either.
“Nowadays, we have a whole range of more efficient fans, and more coming along; control technology has moved on – we can be more accurate in how much air comes down the system, and we don’t need to build in such a big margin to allow for system deterioration over time. We’ve striven to take advantage of all this in the new HTM.” Malcolm Thomas explained that the authors had also striven to provide background information to assist the understanding of client needs.
A clarification of design parameters The new HTM also incorporated ‘a clarification of design parameters’. “There’s been problems in the past with what standards we actually want,” he explained. “We’ve now got much more of a clarification of design parameters.” In terms of ‘the new elements’, the HTM’s authors had put in the user requirements, listed under ‘surgical’, ‘medical’, ‘mental health’, ‘palliative care’, ‘and so on’. He said: “We have thus sought to answer the questions: ‘What does the user want, and why have we provided ventilation?’, ‘What’s it for?’, ‘Is it for infection control, comfort, or to remove odours?’ What’s it about?’ Again, it is about trying to clarify for the designers exactly what is important, and what you can do some adjustment on.” He continued: “We’ve also introduced the concept of the Ventilation Safety Group, mirroring what we already have with the Water Safety Group, i.e. a group of Trust stakeholders made up of people from Estates, Finance, and Infection Control, and other key
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www.stj.uk.com January 2022 Health Estate Journal 27
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