Case C-329/19: Judgment of the Court of Justice (First Chamber) of 2 April 2020 (request for a preliminary ruling from the Tribunale di Milano — Italy) — Condominio di Milano, via Meda v Eurothermo SpA (Reference for a preliminary ruling — Consumer protection — Directive 93/13/EEC — Unfair terms in consumer contracts — Article 1(1) — Article 2(b) — Definition of ‘consumer’ — Commonhold of a building)