Issan
Residential: Single Dwelling
Passivhaus Plus Certification
Outtrim, VIC, 2018
This Certified Passivhaus was designed as a compact rural weekender for clients seeking sustainability and convenience. Located approximately 100 kilometres south-east of Melbourne, the retreat is situated within 40 acres of biodynamic vineyard. Nearing retirement and keen to avoid the hassle of regular commuting, our vigneron clients were seeking small but sophisticated on-site accommodation. Briefed to create a modest and fully self-sufficient house, our solution is an economical and low maintenance design with a compact 118sqm floor area across three levels. Off-grid without sacrificing comfort, the house features a heat recovery system, waste treatment, greywater treatment and off-grid power supply, as well as semi-submerged basement cellar suitable for wine storage, a loft space for guests, and a generous outdoor deck for entertaining. Inspired by the rural surrounds and farm shed aesthetic, the design features a paired-back and low embodied energy materials palette of timber and iron, with the addition of European triple-glazed composite windows for exceptional performance.
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AIRTIGHTNESS n50 ACH@50pascals: 0.6
HEATING DEMAND (kWh/m².yr): 18
COOLING DEMAND (kWh/m².yr): 2
HEATING LOAD (W/m²): 8
COOLING LOAD (W/m²): 15
PRIMARY ENERGY RENEWABLE DEMAND (PER): 51
PRIMARY ENERGY DEMAND: 98
RENEWABLE ENERGY GENERATION (PER): 94 -
PROJECT NAME: Issan
LOCATION: Outtrim, South Gippsland, Victoria
NCC CLIMATE ZONE: 6 - Mild temperate
NATHERS CLIMATE ZONE: 22
YEAR OF COMPLETION: 2018
PROJECT TYPE: New Build
RESIDENTIAL: Single Dwelling
CONSTRUCTION TYPE: Timber frame
CERTIFICATION LEVEL/ ENERGY STANDARD: Passivhaus Plus -
MHRV SYSTEM: Zehnder CA 180
DOMESTIC HOT WATER SYSTEM: Rinnai solar evacuated tube with electric boost. 200L storage cylinder
EXTERIOR WALL TYPE, U-VALUE : Timber Frame insulated with mineral wool batts, 0.264
FLOOR SLAB TYPE, U-VALUE: Suspended timber floor, 0.138
ROOF INSULATION TYPE, MANUFACTURER: Mineral Wool
ROOF CONSTRUCTION: Metal Deck roof, Timber Frame insulated with Mineral Wool batts
ROOF ENVELOPE U-VALUE: 0.112
GLAZING TYPE, MANUFACTURER, G-VALUE, U G-VALUE: Press Glass 4-16-4-16-4 triple glazed argon fill, Logikhaus, 0.53, 0.58
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Self sufficient and highly efficient planning of the house. House was constructed over an existing dam that had become redundant to save excavation costs.
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The Passivhaus airtightness requirements on a compact dwelling like this is very difficult to achieve. The builder also commented on the complexity of building in a high wind area.
Project Members
PASSIVHAUS CERTIFIER: Detail Green
PASSIVHAUS CONSULTANT/ DESIGNER: Grün Consulting
ARCHITECT: Maxa Design
INTERIOR DESIGNER: Client
BUILDER: Goycon Builders
STRUCTURAL ENGINEER: Einnim Engineering
WINDOW SUPPLIER: Logikhaus
HRV SUPPLIER: Fantech
AIRTIGHTNESS MEMBRANE SUPPLIER: Intello from Laros/Proclima
INSULATION SUPPLIER: Bradford Gold
ROOFING SUPPLIER: Lysaght
BLOWER DOOR TESTER: Lysaght
PHOTOGRAPHER: Chris Neylon