Scamander Passivhaus A
Residential: Single Dwelling
Passivhaus Classic Certification
Scamander, TAS, 2023
Achieving Passive House Certification, Scamander Passivhaus was constructed using CLT panels and wood fibre insulation, and was in part an exercise in the cost effectiveness of this type of construction in the residential setting.
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AIRTIGHTNESS n50 ACH@50pascals: 0.15
HEATING DEMAND (kWh/m².yr): 12.7
COOLING DEMAND (kWh/m².yr): 9.7
HEATING LOAD (W/m²): 9.2
PRIMARY ENERGY RENEWABLE DEMAND (PER): 34.8 -
LOCATION: Scamander, TAS
NCC CLIMATE ZONE: 7 – Cool temperate
NATHERS CLIMATE ZONE: 67
YEAR OF COMPLETION: 2023
TREATED FLOOR AREA: 129.6m2
PROJECT TYPE: New Build
BUILDING TYPE: Residential: Single Dwelling
CONSTRUCTION TYPE: Cross Laminated Timber
CERTIFICATION LEVEL/ ENERGY STANDARD: Passivhaus Classic
THIRD PARTY CERTIFICATIONS: Nathers -
PREFAB ELEMENTS: CLT walls, roof, mezzanine floor and ceiling
MHRV SYSTEM: Zehnder ComfoAir 180 Luxe
DOMESTIC HOT WATER SYSTEM: Sander heat pump HWS 160L
EXTERIOR WALL TYPE, U-VALUE: Wood fibre panel (140mm), 0.227
FLOOR SLAB TYPE, U-VALUE: Lightweight (bearer/joist/woodfiber deck/joist/chipboard/timber flooring), 0.146
ROOF INSULATION TYPE, MANUFACTURER: Pavatex Wood fibre panel (140mm)
ROOF CONSTRUCTION: Cross laminated timber with external insulation and ventilated cavity
ROOF ENVELOPE U-VALUE: 0.210 / 0.243
WALL FRAME TYPE, U-VALUE: Cross Laminated Timber, 0.227
GLAZING TYPE, U W-VALUE, G-VALUE, U G-VALUE: Unilux Timber/Alu triple glazed windows, 0.5, 0.5
EXTERNAL DOOR TYPE, MANUFACTURER, U D-VALUE: Unilux Timber/Alu triple glazed & sandwich panel doors, 0.6
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An oblique & asymmetric geometry provides the building a unique form and the exposed cross laminated timber frame (with UV treatment and a hint of white pigment) creating intersections of both form and material throughout the house. Internally the Hand crafted internal doors matching the CLT walls, constructed from packing timber left over from the CLT transport, with recessed handles that supports through door ventilation, providing form and function together in a soft presentation that merges with the adjacent elements. The oblique geometry continues throughout the house, by way of joinery and detailing, creating a playful and interesting space.
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Cost increases throughout the industry during 2021-2023 was a real challenge, requiring some problem solving and a lot of hands on hard work to bridge the gap.
Project Members
ARCHITECT/ CONTRACTOR/ PH SPECIALIST/ MECHANICAL / ENVIRONMENTAL/ QUANTITY SURVEYOR: Spectura Studios
PASSIVHAUS SPECIALIST: Spectura Studios
BUILDER: East Coast Passive House
PASSIVHAUS CERTIFIER: Marcus Strang - HipvHype
STRUCTURAL ENGINEER: Intergral Engineering
PROJECT MANAGER: Matt Purves
WINDOW SUPPLIER: Uniluc
HRV SUPPLIER: PHCP
AIRTIGHTNESS MEMBRANE SUPPLIER: Siga (Zero Emissions Building Australia)
INSULATION SUPPLIER: Pavatex (Lifepanels)
ROOFING SUPPLIER: Lysaght
BLOWER DOOR TESTER: Wilderness Homes
CLT: Stora Enso
PHOTOGRAPHER: Ben Dilger