<https://www.matyco.com/termoidraulica/caldaie-murali/caldaie-a-condensazione/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.matyco.com/baxi-luna-duo-tec-e-28-caldaia-a-condensazione-bxi-a7720026>