Thermal Residential Building Renovation – HVAC Systems, Vienna

Summary

City of Vienna (Wiener Wohnen) is seeking contractors to perform HVAC (heating, ventilation, air-conditioning) and sanitary fixture installation work as part of a thermal renovation project for a residential building complex at Molitorgasse 15 / Dopplergasse 2 in Vienna's 11th district. The contract is for 36 months starting November 2, 2026. This is a two-stage competitive negotiation procedure open to SMEs, with a maximum of 5 qualified bidders invited to the second stage. Award will be based 95% on price and 5% on warranty extension.