ARCHITECTURE & DESIGN
well-considered hard landscape proposal which responds to the local vernacular and the retained and refurbished Baden Powell House.
Retention of mature tress Retention of existing mature trees is an important aspect of the design, adding to the enhancement of amenity and character value, historic cohesion, and biodiversity net gain. All of this will create a welcoming, inclusive, and nurturing environment for all users, whether occasional or frequent. There will be a number of key character areas which create distinction between attributes of functionality, identity, and hard and soft landscape characteristics, including an entrance piazza, an arboretum garden, a community sensory garden, and a linear park between the car park and the landscaped areas.
MEP design The building is designed to meet the requirements of an operational Net Zero carbon facility, with minimisation of energy consumption embedded in the design of the building and systems. There
A street-level view of the new integrated healthcare facility.
is also a client requirement to achieve a DREAM (Defence Related Environmental Assessment Methodology) ‘Excellent’ rating. The project has followed a ‘Lean, Clean,
Green’ energy hierarchy to minimise energy performance, which involves a number of key design strategies, such as maximising natural ventilation, using air source heat pumps, implementing low-energy LED lighting and automatic controls, installation of photovoltaics, and inclusion of electric vehicle charging units.
Mihalis Walsh
Mihalis Walsh is an Architect director at BDP. In his 15 years with the practice, he has worked in sectors including education, healthcare, workplace, housing, masterplanning, and infrastructure. His experience extends across the full spectrum of the design process – from briefing and initial concept design, to project delivery, and he leads BDP’s Catterick Integrated Care Campus project team. His completed projects have won, and been shortlisted for, several high-profile awards, including a RIBA National Award. Recent projects include the NHS Nightingale Hospital in Harrogate, and Don Valley Academy in Doncaster. He is currently leading the design team for a new hospital outpatient building in Stoke- on-Trent.
38 Health Estate Journal April 2023
Building orientation The building form and orientation have been developed to maximise control of solar gain and minimise the risk of overheating, with the series of courtyards along the southern elevation providing self-shading to the perimeter rooms and staircores. The rooflights above the atrium are north-facing to reduce solar gain, while maximising the provision of daylight and ventilation via built-in louvre bands. The development has taken a ‘fabric
first’ approach to reduce the overall energy demand and carbon emissions. This includes improving fabric performance considerably beyond Part L minimum standards, minimising the surface area of the thermal envelope to reduce thermal demands, minimising heat loss through thermal bridges in construction detailing, and optimising the façade design to balance energy efficiency and thermal comfort. In conjunction with passive design features, the development will use highly efficient systems to further reduce
energy consumption and minimise CO2 emissions.
Ventilation The building ventilation strategy was developed to minimise reliance on mechanical ventilation, and utilise natural and hybrid ventilation systems wherever viable, via openable windows and Natural Ventilation Heat Recovery (NVHR) units. This helps to reduce the operational
energy of the building. The NVHR units in naturally ventilated spaces become active during the summer months to mitigate against overheating where air temperature exceeds certain predetermined limits. Additional units can be added to enable ventilation to be increased, to mitigate against future overheating and thermal comfort challenges.
Heating and cooling The proposal includes an air source heat pump (ASHP) system to generate and deliver the building’s space heating, cooling, and domestic hot water demands. As the building’s energy demands will be met by electrically-led systems, there will be a reduced reliance on non-replenishable sources of energy. PV arrays will be installed on the roof of the facility to support the requirements of Part L2A, greatly exceeding minimum area requirements, and to support the achievement of DREAM and Net Zero Carbon targets.
Lighting The performance of the glazing has been carefully considered to maximise natural daylight penetration, and reduce the reliance on artificial lighting, while also allowing a controlled amount of passive solar heating. Where artificial lighting is required, low-energy systems and products are specified to reduce energy consumption, in conjunction with full lighting control systems, including daylight linkage and presence detection.
A multi-service primary care facility The Catterick Integrated Care Campus will be an innovative, multi-service, primary healthcare facility bringing together the MoD and NHS in one modern healthcare building. This paves the way for a new delivery model, and it is an opportunity to collaborate and to focus on the health needs of the whole population in the area through excellence in clinical design, practice, and learning.
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