Two semi-detached houses in timber frame construction were built on top of a partial basement (heated) with an adjacent underground garage. The ceiling of the underground garage was planted with greenery and is used as a terrace from the ground floor of the semi-detached houses. The Photovoltaic system on the roofs supplies the compact units with electricity.

Thermal envelope

Roof:

U-value = 0.107 W/(m2K)

Frame:

Holzwin Fensterbau GmbH, SmartWin, Holz-Alu
U w-value = 0.805 W/(m2K)

Glazing:

Triple glazing 4/18/4/18/4 with argon filling
South/West/East: Ug = 0.64 W/m2K, g-value = 0.63
North: Ug = 0.53 W/(m2K), g-value = 0.50

Entrance door:

pro Passivhausfenster GmbH
U d-value = 0.73 W/(m2K)

Mechanical systems

Ventilation:

Controlled ventilation with a Passive House certified compact ventilation unit "Stiebel-Eltron LWZ 304". Heat supply: 87 % (PHI-certified). Electrical efficiency: 0.42 Wh/m³

Heating installation:

The heat is generated by the compact unit and is transferred to the rooms via the underfloor heating.

Domestic hot water:

The compact unit produces the hot water.

PHPP values

Air tightness n50 = 0.47/h

Annual heating demand: 14 kWh /(m2a ) calculated according to PHPP

Heating load: 11 W/m2

PE demand (non-renewable Primary Energy): 64 kWh /(m2a ) on heating installation, domestic hot water, household electricity and auxiliary electricity calculated according to PHPP

PER demand (renewable Primary Energy): 45 kWh /(m2a ) on heating installation, domestic hot water, household electricity and auxiliary electricity calculated according to PHPP

Find more details here.