Delivery Of Fittings For The Modernization Of Nodes By Opec Sp. Z O. O. In Puławy Implemented For The Task Entitled: "Improving The Efficiency Of The Heating Network By Eliminating Group Nodes And Replacing Sections Of The District Heating Network Made Using Foam Concrete Technology In Puławy" Under The European Funds For Infrastructure, Climate, Environment 2021-2027 Program (Feniks) In The Area Of Priority Fenx.02 Support For The Energy And Environment Sectors From The European Regional Development Fund