(August Hilmer Andersson) 

1897 August Hilmer Andersson started manufacturing at Ljung.

1977 AHA and Tour Agenturer merged under the name Tour & Andersson AB (TA).

1995 TA was divided into two independent companies. TA Hydronics was formed.

1997 IMI plc acquired TA Hydronics.

2001 Foundation of IMI Indoor Climate.