What is the fine-grained topic of the following text: Graduating from CVUT a Czech Technical University in 1988, specialising in HVAC, Mr Prihoda was immediately enthusiastic about Fabric Ducting as a concept, recognising the aesthetic simplicity of the product enhanced by its ability to resolve or improve so many air movement issues. Only return the topic.
Mr. Prihoda's specialization in HVAC and interest in Fabric Ducting after graduating from CVUT.