Client:
City building management department in cooperation with Klinikum Region Hannover GmbH
back to list
Ricklinger Straße, Hannover
Description
The property is located in Hannover's Linden-Sud district, near the Humboldtschule a modern, compartmentalized school built in the 1960s as well as a surface air-raid shelter dating back to the 40s; other neighboring buildings reflect the Wilhelmine-era architecture typical of the area. The two-story building, with its extensive glazed facade, is set at an angle opening out toward the south and east partially enclosing a paved courtyard which provides a play area for the smallest children. This courtyard is defined by individual free-standing shear walls and a play structure; it opens out to the southeast, where an adjacent green belt holds playground equipment and ball fields for the preschool and after-school care groups.
The building shell is kept largely closed to the north and west, creating a feeling of protection from the outside world. The entrance and circulation areas are located in the northwest corner facing the forecourt, making them easy to find. All of the building's open areas and ground-floor rooms are fully wheelchair-accessible, and an elevator provides barrier-free access to the upper floor. A handicapped-accessible restroom is located on the ground floor.
Parties involved
Project management:
City building management department with SPM Stein Projektmanagement
Planning and construction management - structure:
vorrink wagner architekten bda
Planning and construction management - building technology:
Ingenieurbüro Wolf + Weiskopf GmbH und Döring Beratende Ingenieuro GmbH
Energy consulting:
Krämer-Evers Bauphysik, Osnabrück
Building data
Building type:
Five-group child care center
Location:
Hannover-Linden Süd
Year of construction:
2008 - 2009
Heated usable space:
899 m²
Subsidies:
proKlima
Building shell
EXTERIOR WALLS:
17.5 cm lime-sand brick masonry with wooden curtain-wall construction and 28 cm mineral wool insulation; colored fibratedcement siding; HTC = 0.15 W/(m2K)
Windows:
Wood-aluminum windows with heat-insulating triple glazing; HTC = 0.7 W/(m2K) including installation-related heat bridging
Roof:
Wooden roof construction with 36 cm total mineral wool insulation, pitched at 10° angle; HTC = 0.11 W/(m2K)
Ceiling insulated from below against outside air:
Entrance area: reinforced concrete ceiling with 35 cm polystyrene insulation underneath, melted asphalt over footfall sound insulation above;
HTC = 0.09 W/(m2K)
Floor Plate:
Concrete slab with 40 cm cellular glass insulation on underside; floor screed over 8.5 cm total insulation on top side; HTC = 0.15 W/(m2K)
Building technology
Ventilation:
Comfort-ventilation system with heat recovery; heat distribution effectiveness = 78 %
Heating:
Residual heating is provided by Hannover public utility services via a district heating network connection.
Air conditioning:
no active air conditioning The following measures were taken to help ensure comfortable summertime building temperatures:
>> solid construction provides intermediate storage of absorbed summer heat
>> exterior sun protectors controlled via wind and sun monitors
Measured values
AIRTIGHTNESS:
n50 = 0.6 h-1
Calculated values
Calculated method: Passivhaus planning package
HEATING ENERGY NEEDS:
15 kWh/(m²a)
TOTAL ENERGY NEEDS FOR HEATING,AIR CONDITIONING,DHW,ELECTRICITY:
District Heating
60 kWh/(m2a)
Electricity
16 kWh/(m2a)
PRIMARY ENERGY NEEDS FOR HEATING,AIR CONDITIONING,DHW,ELECTRICITY:
65 kWh/(m2a)
CO2 EMISSIONS FOR HEATING,AIR CONDITIONING,DHW,ELECTRICITY:
15 kg/(m2a)
