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end result in terms of carbon savings by using different tech- nologies. The brief was to provide a “healthy, bright environ- ment and create a sense of well-being to aid the occupant’s recovery treatment”. Throughout the project, the design has mostly eschewed mechanical ventilation and air conditioning in favour of natural ventilation. This was achieved by using the two internal courtyards and a


shallow plan to allow for a Windcatcher natural ventilation sys- tem that has been devised by Monodraught and utilises the pre- vailing wind from any direction to limit the necessity for air con- ditioning systems. Atkins’ design modelling suggests that this natural ventilation instead of air conditioning, in the treatment and consultation rooms, gym area, bedrooms, offices, dining


areas and reception areas, will provide savings in carbon emis- sions of around 40,000 tonnes a year. The 112 sq m of solar photovoltaic panels on the roof will be


used to power the mechanical ventilation where needed and to charge a battery-powered lift. There will be a surplus from the 15 kW of electricity generated and this will feed into the elec- tricity grid under the Department of Energy and Climate Change feed-in tariff scheme that incentivises small scale low carbon electricity generation. As the building will typically be 75 to 80 per cent occupied at


all times, that meant that back-up such as the gas condensing boilers was necessary, but the design team decided against more costly renewable technology, such as combined heat and power


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