The biggest challenge was to find space for new infrastructure, since the building is situated in the heart of Warsaw, where there is a lot of underground infrastructure. The infrastructure no longer in use was identified and removed to make space for new connections. The highest risk stemmed from adjusting the installation to the architectural and structural limitations. The architect’s plan called for the installation to be carried out through the holes in the trusses. Since the Rotunda PKO Bank Polski is an iconic historical building, the refurbishment is under the supervision of a conservation officer, creating another challenge for WSP consultants.
Modelling analyses were used to steer the design process, and two assessors and energy modellers carried out certification and modelling processes to help the design teams create a sustainable, energy-efficient building. The solution WSP chose was inspired: locating the devices in a way that left the roof free. The air intake and exhaust devices were installed in the wall protecting the stairway. The odour exhaust vents were fitted into the architectural details of the roof, which was difficult due to limited space. Devices such as AHUs, chillers, transformers and pump stations were placed in the underground part of the building.
All phases, including agreement on the new network infrastructure, were finished in a year and a half. The building design was rated EXCELLENT in the BREEAM certification and is aiming for GOLD rating in LEED, which gives the investor huge marketing benefits.