Langwarrin Eco Home 2019

Langwarrin Eco Home
Langwarrin VIC 3910
10am – 4pm
House Open Style
Regular Guided Tours-No booking required, starting on the hour ~1hr duration
Housing Type
Standalone House
Project Type
New build with 4 yrs of continual improvement
Pure Eco Homes
Pure Eco Homes
House Size
Number of bedrooms
Number of bathrooms

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
Estimate of annual savings
BAL Rating
BAL – 12.5: Ember attack with heat up to 12.5kW/m2
Roofing materials
Insulated panel (sandwich panels)
Wall materials (external and internal)
Structural insulated panels (SIP's)
Window and door types
Double glazing
Low-e, films
Window and door shading
Honeycomb blinds
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 - Under roof
Type: Insulated panels
Rating: R4.2
Insulation - Internal/external walls
Type: Bondor Insulwall SIPs
Rating: R3.7
Insulation - External walls
Type: Insulated panel system
Rating: R3.7
Insulation - Internal walls
Type: Insulated panel system
Rating: R3.7
Insulation - Other
Proclima membrane wrap and rock wool
Healthy home
Airtight house design
Heat recovery ventilation (HRV)
Indoor plants for air filtration
Low VOC paints/sealer/varnish
Victorian residential efficiency scorecard rating
10 stars
All electric home
Renewable energy
Solar PV grid connect
Size of PV system
Water heating
Hot water heat pump
Passive heating cooling
Passive solar designed home
Active heating cooling
Heat exchange ventilation system
Split system airconditioner
Energy efficiency
Draught proofing
Efficient lighting
Efficient appliances
Energy monitoring
Smart home features
Electric vehicle
Manufacturer/type:Toyota Prius C hybrid 2012
Water harvesting and saving
Above ground rainwater storage
Type: Tanks
Size: 10,000L
Storage connected to
Whole house
Garden / Outdoors
Edible garden
Native plants
Wicking garden beds
Average Daily Energy Consumption Per Person
5.3kWh/day/person from grid after solar consumption
Average Daily Water Usage Per Person
25L/day/person from mains after tank usage
Waste Reduction
Compost all food scraps
Plastic free household