I think, these translations would be best: •chilled water = kaltes/gekühltes Wasser (gekühlt sounds a bit better) •ambient water --> there are multiple possible translations: - **raumtemperiertes** Wasser (this is an **official word** by producers of water dispensers) - ungekühltes Wasser (like you already said) - laues Wasser •hot water = warmes/heisses Wasser Hope I could help you.