Langwarrin Eco Home 2019

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Langwarrin VIC 3910
    • Housing Type:
    • Standalone House
    • Project Type:
    • New build with 4 yrs of continual improvement
    • Builder
    • Pure Eco Homes
    • Designer
    • Pure Eco Homes

About Langwarrin Eco Home

The Langwarrin Eco Home is a prototype sustainable house built by Pure Eco Homes.

This build was the first of its kind to combine passive house principles with Bondor Insulliving (Insulwall and Solarspan) SIPs. It is also one of the first full double-storey residential homes to be built from Bondor SIPs.

The house boasts additional eco features such as a 13kW PV array, 10,000L rainwater harvesting that supplies filtered water to the entire house with a smart switch to mains backup, low-e double-glazed windows for north and west sides, large north-facing solar-gain window for winter heating (not low-e), external solar heat shield blind for summer, energy-efficient appliances, and energy recovery ventilation (ERV). Since last years open day we have added additional features including Thermadoor garage insulation from, a Sanden Eco hot water heat pump and smart-home automations. This has lead to further substantial energy savings.

Our previous home was only 93m2 (10 sq), but energy costs were $3200 p.a. (as at 4 years ago). This house is now on track for ~$200 p.a. and that includes the running costs of several large tropical aquariums, which we didn’t have previously and without them our energy bill would be in surplus credit. That’s a huge saving compared to our previous home and this house is three times larger.

Toyota Prius C hybrid 2012 EV on display for SHD

Energy Efficiency Certification and Blower Testing
The house scored 3.3ACR under blower testing, which is phenomenal for a large 307m2 (33sq) home. The house also achieved an 8.8 real Star rating .

The house also achieved 10 stars on the Victorian Residential Efficiency Scorecard. In real terms, the house has much lower energy costs than our previous home and maintains a comfortable temperature year-round.

In our tours we will discuss different technologies we have tried, some initial mistakes and their solutions, and changes in habits over the 4 years since we built the property. The main thing we discovered on our sustainable eco house journey was some technologies look good on paper but don’t always work out quite as expected, so tweaks were certainly needed which have been making the property more and more energy efficient and cost effective year on year. We will also discuss additional practises such as zero waste living, recycling and composting.


Years Open
    • Energy efficiency:
    • Draught proofing
      Efficient lighting
      Efficient appliances
      Energy monitoring
      Smart home features
    • Passive heating cooling:
    • Passive solar designed home
    • Active heating cooling:
    • Heat exchange ventilation system
      Split system airconditioner
    • Water heating:
    • Hot water heat pump
    • Water harvesting and saving features:
    • Above ground rainwater storage
    • Average water consumption per day:
    • 25L/day/person from mains after tank usage
    • Above ground rainwater storage Type:
    • Tanks
    • Above ground rainwater storage Size
    • 10,000L
    • Storage connected to
    • Whole house
    • Energy Efficient Lighting
    • LED lights throughout
      Natural daylight
    • Electric Vehicle Type
    • Toyota Prius C hybrid 2012
    • Window Protection:
    • Blinds
      Honeycomb blinds

    • Window Protection:
    • External solar heat shield blind together with internal light filtering and blockout internal blind for large north solar-gain window, thermadoor insulation on west facing garage door
    • Sustainable materials:
    • Recyclable Bondor Insulliving (Insulwall and Solarspan) SIPs
    • Insulation Type:
    • Under-roof
      Internal walls
      External walls

    • Other Insulation Methods:
    • Proclima membrane wrap and rock wool
    • Internal / External Walls Type:
    • Bondor Insulwall SIPs
    • Internal / External Walls Rating:
    • R3.7
    • Under Roof Insulation Type:
    • Insulated panels
    • Under Roof Insulation Rating:
    • R4.2
    • Internal Walls Insulation Type:
    • Insulated panel system
    • Internal Walls Insulation Rating:
    • R3.7
    • External Walls Rating:
    • R3.7
    • External Walls Type:
    • Insulated panel system
    • All-Electric Home?
    • Yes
    • Renewable energy used:
    • Solar PV grid connect
    • Size of PV system:
    • 13kW
    • Average Daily Energy Consumption:
    • 5.3kWh/day/person from grid after solar consumption
    • Estimate of annual savings:
    • $4200
    • House Size
    • 300m2
    • BAL Rating
    • BAL – 12.5: Ember attack with heat up to 12.5kW/m2
    • Roof
    • Insulated panel (sandwich panels)
    • Wall Materials
    • Structural insulated panels (SIP's)
    • Window and Door Types
    • Double glazing
      Low-e, films
    • Number of bedrooms
    • 5
    • Number of bathrooms
    • 3
    • Garden / Outdoors
    • Wicking garden beds
    • Garden / Outdoors
    • Composting
      Edible garden
      Native plants

    • Waste Reduction Practices:
    • Compost all food scraps
      Plastic free household
    • Healthy home features
    • Airtight house design
      Heat recovery ventilation (HRV)
      Indoor plants for air filtration
      Low VOC paints/sealer/varnish

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