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Sticksfeld, Hanover

Description

The four rows of the passive house estate are located in the district “Kronsberg”, a residential area which was new created in the context of the EXPO 2000. For the first time, thermal heat was supplied via supply air. Singularly the bathrooms were equipped with small radiators. The outstanding energy consumption is so small that it is possible to compensate the total needed residual energy for heating, water heating and electricity financially through renewable energies: with a stake of 2,6 kW in the wind power plant Kronsberg – which is included in the house price – total climate neutrality is realized.

Involved parties

Client:

Rasch&Partner Bauen u. Wohnen

Design:

Dipl.-Ing. architect Petra Grenz

Building data

Building type:

row house

Location:

Hanover-Kronsberg

Year of construction:

1998

Residential units:

Heated usable space:

3576 m², 75 to 120 m² each house

Subsidies:

EU project CEPHEUS, KfW, proKlima

Building shell

EXTERIOR WALLS:

heat-insulated wood panel element (north and south face), HTC = 0,13 W/(m²K) current precast component with heat insulation composite system (gable wall), HTC = 0,10 W/(m²K)

WINDOWS:

wooden windows with high-insulating profile core with facing shell made of aluminium; heat-insulating 3-pane-glazing HTC = 0,83 W/(m²K) with taking the installation into face

ROOF:

insulated wood panel element, HTC = 0,10 W/(m²K)

BASEMENT CEILING:

concrete ceiling with 30 cm insulation from underneath, HTC = 0,10 - 0,13 W/(m²K)

Building technology

VENTILATION:

comfort ventilation system with heat recovery functions, the device has counterflow heat exchanger and DC fans. The energy efficiency is excellent: for every the used kWh of electricity 16.5 kWh heat are obtained back

HEATING:

heat supply for water heating and space heating via local heat and a solar plant for water heating on each house, heat distribution via supply air and radiators in the bathrooms

AIR CONDITIONING:

no active air conditioning installed

Measured values

AIRTIGHTNESS:

n₅₀ = 0,17 up to 0,40 h^-1

median

n₅₀ = 0,27 h^-1

ENERGY CONSUMPTION:

Heating period 1999/2000

14,9 kWh/(m²a) heating energy needs

Heating period 2000/2001

13,3 kWh/(m²a) heating energy needs

Heating period 2001/2002

12,8 kWh/(m²a) heating energy needs

Calculated values

Calculated method: Passivhaus planning package

HEATING ENERGY NEEDS:

12 kWh/(m²a)

(median)

PRIMARY ENERGY NEEDS FOR HEATING,AIR CONDITIONING,DHW,ELECTRICITY:

75 kWh/(m²a)

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