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Results of the Evaluation Study DeAL Decentralized Facade Integrated Ventilation Systems
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Most office buildings in Germany have either no mechanical ventilation system or a centralized ventilation system with fresh and exhaust air supply. Within the last 10 years some projects using decentralized ventilation systems (DVS) came up. Common for this type of decentralized systems is that they take fresh air directly from outside through the facade via the DVS into the room. Within the DVS-component air conditioning (at least heating) takes place. Since the year 2000 more than six companies provide this type of ventilation systems for office buildings and about 50 buildings have been realized in Western Europe. Within a two year research project the evaluation study DeAL investigated 10 of these buildings in respect of: • How do the DVS operate in reality (reliability, energy consumption, noise etc.)? • Are the users and operational staff satisfied with DVS? • Are there advantages that can be quantified within the evaluation buildings? • What is the thermal comfort in these buildings? • Is maintenance a problem with decentralized systems? • Does the necessary "wholes" in the façade influence the building performance (wind, sound protection, water tightness...)? The investigation included detailed monitoring of the DVS for a period of at least one year. The study was finished by August 2008.
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Mahler, B.; Himmler, R. (2008). Results of the Evaluation Study DeAL Decentralized Facade Integrated Ventilation Systems. Energy Systems Laboratory (http://esl.tamu.edu). Available electronically from