Brumlovka office building in Prague undergoes major renovation

The complete reconstruction of Administrative Building B in the Brumlovka complex has resulted in a remarkable reduction in energy consumption, achieving more than a 50% decrease since its renovation. Originally built in 1999 by Passerinvest Group, a.s., the revitalized building was completed in 2020 and now boasts upgraded energy-efficient technologies and a new facade.

The nine-storey building, which encompasses 14,600 square meters of leasable office space and 1,250 square meters of commercial area, underwent extensive renovations that included the complete overhaul of its exterior and roofing. These updates not only improved the building’s aesthetics but also enhanced the quality of the indoor environment. As a result, Building B now meets the energy label category B, indicating efficient and economical operation.

According to measurements taken before and after the renovation, electricity consumption has plummeted from approximately 3.6 MWh in 2018 to around 1.7 MWh in 2022, representing a reduction of over 50%. Additionally, the carbon footprint associated with electricity and heat consumption has been cut by 65% compared to the building’s original state.

Martin Unger, Technical Director of Passerinvest Group, emphasized the importance of energy efficiency in the decision to renovate. “One of the main reasons for the renovation was the need to enhance energy efficiency, which the building no longer met. Our goal was a comprehensive revitalization that would reduce energy consumption, lessen environmental impact, and improve tenant comfort,” he explained.

Following the renovation, Passerinvest further optimized the operation of ventilation, heating, and cooling technologies in 2022 to maximize energy efficiency. As a result, additional reductions in energy consumption and CO2 emissions were achieved in 2023. “The optimization involved modifying the building’s measurement and control systems, implementing algorithms for HVAC units based on occupancy, and adjusting central temperature settings according to seasonal changes,” Unger noted.

One notable initiative was the introduction of a hygienic material press, which significantly reduced the volume of hygienic paper waste. An analysis conducted in May 2023 revealed that monthly waste included a substantial amount of paper towels, which was subsequently reduced by 17 containers of 1,100 liters each.

The renovation also incorporated blue-green infrastructure features, such as roof gardens and a high-capacity rainwater catchment tank, contributing to sustainable water management around the building.

With a total investment of CZK 470 million (approximately €19 million), the renovation of Building B underscores Passerinvest’s commitment to sustainable practices and enhanced tenant experiences in the evolving landscape of modern office spaces.