Gemmill Lloyd House Dunedin

Project Team

Architecture & Passive House Design Team Green Architects –
Construction Stevenson & Williams Ltd
Certifier Mead: Energy & Architectural Design Ltd

A stunning site overlooking the dramatic coast line south of Dunedin, required a building which would capture the views whilst sheltering from the ever changing weather patterns. This home was designed for a forward thinking family who understood the benefits of Passive House to give them complete comfort at low energy. The house also comes with a PV array which means they are often generating more energy than they are using.

The orientation of the house presents a dramatic view to the south-west, capturing the view through picture windows on both levels. The challenge of a view in the opposite direction to the sun, led Team Green Architects to create a design which promotes a long elevation to the north-west to capture maximum sun, light and energy throughout the house.

Passive House Metrics

  • Heating Demand 13 kWh/m2/year
  • Heating Load 10 W/m2
  • Frequency of Overheating0 % year over 25°C
  • TFA 182 m2
  • Form Factor3.0
  • Air leakage @ 50Pa0.5 ACH
  • PE demand94 kWh/m2/year

Not in Passive House Database

Construction Details Average Values

  • U-value External Walls0.21 W/(m2K)(R4.7)
  • 140 timber stud / Intello / 45 batten fiberglass insulation
  • U-value Floor0.13 W/(m2K)(R7.6)
  • Concrete slab over 200mm XPS
  • U-value Roof0.13 W/(m2K)(R7.5)
  • 300mm fiberglass with Intello air control layer
  • U-value Glass0.60 W/(m2K)(R1.7)
  • Triple low-e argon
  • U-Windows0.88 W/(m2K)(R1.1)
  • Laros Doepfner IV78 timber/alu
  • Air Control Layer
  • Intello, Concrete Slab
  • Ventilation Efficiency84%
  • Zehnder ComfoAir 350

Photos provided by PHINZ