Saia PCD ® – Reference Asceticism and Automation Energy-efficient instrumentation, control and automation technology behind venerable abbey walls In 1330, Holy Roman Emperor Louis IV (also known as Ludwig IV) fulfilled his oath and founded Ettal Abbey in the Ammergau valley in Upper Bavaria. The name Ludwig again played a major role for the abbey almost 700 years later. Requirements Renovation of the obsolete HVAC technology and networking

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