A compact gas dryer (100) comprises a primary heat exchanger (200) exchanging heat between hot, incoming, contaminated gaseous medium and outgoing dry, cool gaseous 5 medium, a secondary heat exchanger (300) exchanging heat between incoming cold gaseous medium from the primary heat exchanger (200) and a refrigerant, and a condense trap (400) trapping condensable matter in the cooled gaseous medium exiting the secondary heat exchanger (300). 10 Afterwards, the dry, cool gaseous medium exchanges heat with the incoming contaminated gaseous medium in the primary heat exchanger. The primary heat exchanger (200), the secondary heat exchanger (300) and the condense trap (400) are combined into a single unit (100).