Abstract: Apparatus for performing electrolysis and generating heat, the apparatus including an electrolysis cell including, a cell housing defining an electrolyte cavity, the electrolyte cavity containing an electrolyte in use, a plurality of substantially parallel spaced apart electrode plates provided within the electrolyte cavity, the electrode plates defining at least one anode and at least one cathode at least partially submersed within the electrolyte in use, at least two connectors, which in use are connected to an electrical power supply thereby allowing an electrical current to be supplied to the electrolyte to thereby perform electrolysis and heating of the electrolyte, at least one cell outlet in fluid communication with the electrolyte cavity, the at least one cell outlet being coupled to a heat recovery module in use and at least one cell inlet allowing electrolyte to be supplied to the electrolyte cavity.