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Hilson Moran showcases environmental strategy for Walkie Talkie Sky Garden

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Multi-disciplinary engineering consultancy, Hilson Moran, led a tour of the Walkie Talkie’s Sky Garden as part of the annual Green Sky Thinking Week run by Open City, an initiative set to showcase best practice sustainable design solutions and highlight current technologies, policy and thinking. Hilson Moran completed the base build and fourteen fit-out floors, eight CAT A and six CAT B, in the iconic 20 Fenchurch Street building. The tour was hosted on Friday 29 April to give attendees an insight into the environmental strategy behind the BREEAM Excellent-rated building.

The tour of the 155m-high Sky Garden was conducted by Dan Jestico, Head of Research and Development at Hilson Moran, and focused on how passive design and the various technologies integrated into the building systems work together to reduce emissions and contribute to helping London meet its 60% reduction in CO2 emissions target by 2025.

The Hilson Moran design for 20 Fenchurch Street included the first hydrogen-powered fuel cell installed in the City of London and is similar to that originally developed for the Apollo and Shuttle space missions. The fuel cell signifies the client Land Securities’ commitment to pioneering sustainable technology. It generates clean power and will help to reduce the building’s carbon emissions by 6-7%, which is at least 270 tonnes per annum, preventing the emission of more than 18,000 tonnes of pollutants compared to conventional combustion-based power generation.

The Sky Garden uses passive design to moderate internal environments. Natural ventilation is harnessed rather than relying on heating, cooling or mechanical ventilation. Other sustainable solutions include roof-mounted photovoltaic panels predicted to generate 27,300 kWh per year.

Dan Jestico said: “20 Fenchurch Street is an exemplar in environmental strategy for building design. The successful installation and operation of the fuel cell leads the way for sustainable building performance in London and further beyond, while other sustainable innovations demonstrate how green technologies can work together to significantly reduce carbon emissions. The tour was a huge success and we are pleased to be able to share our design strategy and to be working towards a more sustainable built environment as part of the Green Sky Thinking initiative.”


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