| | 1927
Founding of CALORSTAT by Edgar B. FRANK, an American manufacturer, for the production of thermostats and bellows for use in automotive cooling systems under licence from ROBERTSHAW FULTON (USA). | | | | |
| | 1952
Creation of VERNET, a development of the group BOUSSAC (BENDIX division) for the use of the American patent of Sergius VERNET (Yellow Springs, Ohio, USA) for the expansion of wax in the regulation of temperature in washing machines. | | | | |
| | 1962
Acquisition of VERNET by CALORSTAT, principal supplier of thermostats to French and European industry. Relocation from Bagnolet to Vincennes, near Paris.
1969
Acquisition of DECA by CALORSTAT, for integration of its stamping capacity. | | | | |
| |  1971
Relocation of VERNET in Ollainville, near Arpajon (Essonne, France) close to the Headquarters of CALORSTAT. | | | | |
| | 1972
VERNET creates its American subsidiary CALTHERM (Glen Ellyn, near Chicago, Illinois, USA) for the distribution of diesel thermostats in the North American market. | | | | |
| |  1976
CALTHERM starts manufacture of heavy duty thermostats in Columbus (Indiana, USA), headquarters of CUMMINS Engines. | | | | |
| | 1980
Acquisition of CALTHERM by the American Holding company MAGNUM Corporation (Headquartered near Detroit, Michigan).
1984
Restructuring of the CALORSTAT Group. | | | | |
| | 1985
Acquisition of VERNET by MAGNUM Corporation. | | | | |
| | 1990
Creation by CALTHERM (USA) of its Indian subsidiary CALTHERM INDIA (Pune, India). | | | | |
| |  1990
Start of the second French VERNET manufacturing operation at Cinq-Mars-la-Pile (Indre-et-Loire, France), accommodating since 1999 the growth of Sanitary & Heating businesses. | | | | |
| | 1991
Creation of Aftermarket business, manufacturing plant at Ollainville (91). | | | | |
| |  1995
Creation of MLH-VERNET S.A. (Los Toldos, Buenos Aires, Argentina) a subsidiary 81 % owned by VERNET for the manufacture of thermostats for the South American market. | | | | |
| | 1997
Move of « Aftermarket » logistic, conditionning and packaging activities, from Ollainville (91) to Cinq-Mars-La-Pile (37). | | | | |
| | 1998
Creation of BIMANVER ARGENTINA S.A. (Los Toldos, Buenos Aires, Argentina) ), subsidiary of VERNET and ANGLI for the manufacture of thermal switches. | | | | |
| | 1999
First extension of the Cinq-Mars-la-Pile facility(addition of 1.200 m²) dedicated to manufacture of Sanitary & Heating products. | | | | |
| | 2002
Second extension of the Cinq-Mars-la-Pile facility (addition of a further 1.200 m²) to accommodate further growth of the Sanitary & Heating business. | | | | |
| | 2003 et 2004
Years of sustained growth in the Sanitary & Heating sector at Cinq-Mars-la-Pile. At the present time, the total business is almost evenly split with 50 % being Engine applications and 50 % being Sanitary & Heating applications. | | | | |
| | 2006
Establishment of Vernet Chinese Subsidiary : ZHUHAI.
Calorstat™ becomes “Aftermarket” Brand Mark, and one of Cinq-Mars-La-Pile sites is especially dedicated for. | | | | |
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