EXECUTIVE
SUMMARY
The Polygraphia Business Center II Building
is a new construction. It is designed as an office building with garage on two
levels. The building consists of one underground floor occupied by parking lot,
conference rooms, technical and storage areas, ground floor with parking lot
and offices and five floors above, designed for open office spaces. The restrooms
and other service facilities needed for the functionality of the offices are
located in the core of the building, the lifts and stairwells - on both sides
of the building. The Polygraphia Business Center II Building is connected to
the Polygraphia Business Center I via enclosed glass walkway.
HVAC systems
Heating. The heating of the building is provided by the city district heating
system and a heat pump unit.During the transitional seasons the first
source of heating agent is the heat pump unit. The district heating station
provides back up by low outdoor temperatures.A four pipe water
distribution system is selected in order to comply with different requirements
of the premises on each of the building’s facades in the transition seasons. The
heating/cooling of the building is established via floor standing fan coil
units for the offices and corridors and via four-way cassette type units for
the lobby and the conference rooms.
Air
Conditioning. The cold water for the air
conditioning of the building is provided by one air cooled chiller with free
cooling and the heat pump unit. The air cooled chiller can operate in cooling
mode down to an outside temperature of -20 ° C and provides chilled water during
the transition seasons and winter.
Ventilation. The mechanical ventilation of the office spaces is established via
three air handling units with rotary regenerators and built in heat pumps. The
three AHUs provide an outdoor airflow volume of total 13 397 l/s. Each unit
consists of two fan sections (supply and exhaust), rotary wheel recuperation
section, filter section and built in heat pump section. The air is supplied and
exhausted to/from the premises via ceiling air grilles.Exhaust
ventilations are designed also for the technical rooms and storage rooms and
also for the UPS, main switchboard and server room.
