Hydraulic balancing of heating systems and replacement of valves at Friedrichstraße 219

Summary

The tender covers hydraulic balancing of the heating and central hot-water systems at Friedrichstraße 219 in Berlin using Method B, replacement of radiator valves and return-flow fittings with presettable valves, installation of limited thermostatic heads and optimisation of the heating controller’s functions. The contract also includes planning services. Works are scheduled to start on 6 November 2026 and finish on 15 September 2027; where possible, hydraulic balancing is to be carried out during the heating-free period from 15 April to 15 September 2027. Tenders must be submitted electronically in German by 6 October 2026 at 11:30, and alternative tenders are permitted. The bidder must demonstrate professional competence, capacity and reliability and comply with Berlin’s SHK-sector collective-agreement requirements and construction-waste management rules.