Joined Cases C-708/17 and C-725/17: Judgment of the Court (Fourth Chamber) of 5 December 2019 (requests for a preliminary ruling from the Rayonen sad Asenovgrad, Sofiyski rayonen sad — Bulgaria) — ‘EVN Bulgaria Toplofikatsia’ EAD v Nikolina Stefanova Dimitrova (C-708/17), ‘Toplofikatsia Sofia’ EAD v Mitko Simeonov Dimitrov (C-725/17) (References for a preliminary ruling — Consumer protection — Directive 2011/83/EU — Consumer law — Article 2(1) — Concept of ‘consumer’ — Article 3(1) — Contract concluded between a trader and a consumer — Contract for the supply of district heating — Article 27 — Inertia selling — Directive 2005/29/EC — Unfair business-to-consumer commercial practices in the internal market — Article 5 — Prohibition of unfair commercial practices — Annex I — Unsolicited supply — National law requiring each owner of a property in a building in co-ownership connected to a district heating network to contribute to the costs of thermal energy consumption by the common areas and internal installation of the building — Energy efficiency — Directive 2006/32/EC — Article 13(2) — Directive 2012/27/EU — Article 10(1) — Billing information — National law providing that, in a building in co-ownership, bills for the consumption of thermal energy by the internal installation are calculated, for each owner of an apartment in the building, in proportion to the heated volume of his or her apartment)