Dispenser unit with heating device and heat exchanger support for a tank with decomposing and/or freezing fluid

The extraction unit (1) for the extracting of a fluid from a tank (6) is inserted into the tank via an assembly opening (8) and has an immersible body (4) equipped with an extraction pipe and a heat exchanger. A heat exchanger extension (5) in the fitted state of the extraction unit extends away from the immersible body into the interior (9) of the tank. The heat exchanger extension is designed to be deflectable.