Production of electrical heating elements has a more than fifty-year tradition in Hlinsko. In 1943, a small joint stock electrotechnical company ESA was founded. It started with production of small household appliances, namely cookers and irons, where resistant spirals of own production inserted in ceramic base were used.

In 1948, a licence of a Swiss company Maxim-Aurau for production of sheathed tubular heating elements of flat-oval cross section has been bought. This launched an outstanding expansion of production of electrical heating elements and subsequently heating appliances. After becoming a state-owned company in 1948, the company subsequently changed its name to Elektro-Praga Hlinsko in 1950.

A research and development department was founded in 1953. Thus, production of heating elements for various industrial applications was enabled.

In 1960, a production of sheathed heating elements with circular cross section has been started. Since 1964, this production has been concentrated to a new production hall featuring an area of more than 7000 m2. Modern and productive technologies together with construction variability led to dominant market share on the Czechoslovak market.