Shower system

A shower system comprising

• a shower space bordered by a wall and a floor;
• a shower head above the shower space and a shower drain below the shower space;
• a heater and/or a supply input for external hot water;
• a compartment vertically adjacent to the wall and closed off from the shower space by an openable or removable panel;
• a heat exchanger located in the compartment vertically adjacent to the wall closed off by the openable or removable panel, the heat exchanger comprising a helically winding heat exchange conduit with successive windings around a vertical axis in said compartment above the floor of the shower space, and a warm water feed configured to spray water on a top winding of the heat exchange conduit;
• a pump coupled between the shower drain and the warm water feed of the heat exchanger;
• a tap water input coupled to the shower head successively via the heat exchange conduit and the heater and/or a mixing element for mixing water from the heat exchanger with water from the supply input for external hot water,
• wherein the operable or removable panel, upon opening or removal, exposes an outer surface of the heat exchange conduit to the shower space, allowing for removal of solid material from said outer surface.