Messe Stuttgart Sustainability Report Position at July 2017 11 on investment costs 450 000 on annual energy costs and 1 130 tonnes of CO2 During the planning phase the trade fair centre was originally designed for a required heating output of 30 MW However thanks to the heat recovery systems the innovation layer ventilation system and the intelligent and efficient use of ventilation systems and underfloor heating only half of this figure i e 15 MW is required at present The entire trade fair centre is therefore extremely energy efficient Indoor climate Cooling and heating always efficient at Messe Stuttgart Diagram showing thermal comfort due to the layer ventilation system with temperatures in degrees Celsius The arrows indicate the air streams which may occur with natural aeration and ventilation under favourable external conditions

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