Danfoss was the first company to start mass-producing frequency converters in 1968 (to the left).
Mads Clausen started Danfoss in his parents' farm house in 1933.
Mads Clausen used his parents' attic as his office until 1962.
The Danfoss founder Mads Clausen (1906-1966).
The first Danfoss product was an expansion valve for refrigeration systems.
The first radiator thermostat for mass production was developed in 1948.
The founder's wife Bitten Clausen could celebrate compressor number 1 million in 1989.