German heating and refrigeration systems manufacturer Viessmann announced a deal on Wednesday to take over the energy services firm Gritec TopCo. Gritec TopCo, which is based in southern Germany, builds transformer stations for electricity utilities and provides other energy services. The company employs about 1,300 people. The terms of the deal were not disclosed. The takeover by Viessmann is still subject to antitrust reviews. Gritec TopCo was previously taken over by financial investor Capiton in 2022. According to Viessmann, the company could play a key role in the green energy transition …