If you express your request as a conditional -- "if you could open the window, that would be great" -- even though the content is an imperative, the fact that you're not using the imperative voice means that you're not acting as if you're in a relationship of dominance, where you could presuppose the compliance of the other person.
Daca iti exprimi cererea sub forma conditionala: "Daca ai putea deschide fereastra ar fi minunat," chiar daca continutul este un imperativ, faptul ca nu folosim imperativul inseamna ca nu ne comportam ca si cand ne-am gasi intr-o relatie de dominatie pe baza careia poti presupune supunerea celeilalte persoane.