Disclosed is an apparatus for condensing water from respiratory gases. The apparatus has a heat exchange component having an inlet, an outlet and a condensation chamber, the inlet and outlet being connectable to a breathing system, such that respiratory gases are conveyed through the condensation chamber, in use, and a base unit adapted to aid removal of heat from the walls of the heat exchange component. The heat exchange component is releasably engageable with the base unit, such that the heat exchange component is replaceable.