In early 2015, Spotless’ technical and engineering service provider, AE Smith, was awarded the contract to design, construct, operate and maintain Sydney Town Hall’s gas-fired, Microturbine trigeneration power system — the first trigeneration system in New South Wales to feed into the power grid. The low-carbon form of energy production now supplies power, heating and cooling to the iconic, heritage-listed Sydney Town Hall, and neighbouring Town Hall House, where 15,000 City of Sydney employees work. The 1,400 kilowatt system is expected to cut carbon emissions by more than 40,000 tonnes over its 30-year lifetime. The seven 200 kilowatt capstone microturbines can each turn down to a tenth of their total power output, meaning they can follow the electrical demand in the building during summer and winter months. AE Smith was responsible for every facet of construction, from client and building occupier liaison through to supply and installation — including 50 tonnes of structural steel — overcoming the challenge of installing the plant 24 floors up on the roof of the building in the heart of Sydney. Offsite manufacturing was also performed at the start of the project, to reduce onsite time and lessen the impact to the client and building occupants.