The production of electric water heaters dates back to 1960, with the appearance of the Ariston brand, which would propel the Group to leader status in this sector in Italy with the dawn of the 1970s.

In the same years Ariston Thermo acquired Racold,[3] India's largest water heaters' manufacturer, and opened its first wholly owned plant in China.

[5] Ariston Thermo acquired in 2011 Cipag SA and Domotec AG, leaders in Switzerland for the production, distribution and maintenance of water heating systems.

[9][10] In April 2015, signed the acquisition of Gastech-Energi A/S, a leading company in the field of domestic and industrial heating in Denmark, announced during the inauguration in Russia of a new logistics center of approximately 10,000 m2 in the production site of Vsevolozhsk, nearby St.

[12][13][14] During 2017 the Group completed two further acquisitions, one in the United States of America, where in August Ariston Thermo acquired HTP,[15] a leading company in this market for thermal comfort solutions[clarification needed], and the other in Israel in October acquiring ATMOR Group,[16] a leading company in the technology of electric instantaneous water heaters.