Haus Kiap Didimiss 2019

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Trafalgar VIC 3824
    • Housing Type:
    • Standalone House
    • Project Type:
    • Continual Improvement
    • Open with support of
    • Baw Baw Sustainability Network
    • Builder
    • R.E.Rowley

About Haus Kiap Didimiss

Designed for energy efficiency 30 years ago by the owners having had a long interest in energy efficient housing and having climate change in mind and having listened to Dr Graeme Pearman from CSIRO being interviewed on the science show on ABC radio, we purchased a 4 hectare block of land and unlike the norm, instead of the house facing the road we ran the house east west so the house faced north with a large area of glazing which gives solar gain in winter but having put on a 1200mm wide eave to the north which cuts out the sun mid spring till mid autumn.

Although this is currently not the standards of NatHERS it allows for climate change and means we currently do not use cooling in summer other than occasional fan and heating is provided by a wood heater and we only use 1.5 – 2 cubic metres of wood per year. We initially had an electric water heater but when we looked at the energy consumed, changed to a solar hot water system that used glycol heat exchange to allow for the fact of frosts. Although this system used less electricity we were always using electricity and never had very hot water. We have now installed a Sanden heat pump hot water system and always have hot water and use less electricity.

We have 4.9 kW of of solar panels installed which were first in 2009 with others over the next 2 years. We were running a production and retail nursery from our home and using 30 plus kWhs per day initially but reduced the usage to 10.5 per day by efficient pumps irrigation and inside our home.

The lighting in the house is fluorescent tubes individually switched and these are being replaced by led lighting.

The living areas of the house are on the northern side with 4 of the 5 bedrooms on the south, the roof is colourbond in a medium shade, the front door is on the northern side which opens into an airlock.

Appliances have been selected for energy efficiency, all windows have heavy drapes and pelmets.
We grow most of our own fruit and vegetables and preserve around 200 bottles of fruit and tomatoes each year. The orchard consists of 49 trees and we also often produce our own meat.

When we purchased the property the only tree on it was a weed which we removed and subsequently we have planted several hundred trees both on our land and on the side of the road which attract many native birds and provides a habitat for many to live in.

We had a Scorecard assessment carried out in mid 2017 along with a blower door assessment, this encouraged us to better seal our home and increase the insulation in the ceiling and to have A C ceiling fans installed. The air leakage is now down to six and a half air changes per hour, and we are working on decreasing that . Scorecard did not allow for the insulation in the walls as it could not be seen and as the house is 30 years old we no longer have documented evidence to provide.

This house achieved 10 stars with the Victorian Residential Efficiency Scorecard. If you would like to find out more click here.

We believe that Scorecard should be compulsory for all homes being sold as it shows the energy efficiency of a dwelling.

Join the BBSN Bus Tour to visit this and 3 other homes open for Sustainable House Day. Ticket includes tour’s, lunch and transport.

This home is supported by


Years Open
    • Energy efficiency:
    • Draught proofing
      Efficient lighting
      Efficient appliances
    • Passive heating cooling:
    • Cross ventilation
    • Active heating cooling:
    • Ceiling fans

    • Active heating cooling:
    • Wood heater
    • Water heating:
    • Hot water heat pump
    • Water harvesting and saving features:
    • Above ground rainwater storage
      Low flow taps
      Drip irrigation
    • Average water consumption per day:
    • 100L
    • Above ground rainwater storage Type:
    • Concrete and poly tanks
    • Above ground rainwater storage Size
    • 90,000L for garden, 135,000L for potable water (2x 45,000L concrete and 2x 22,500L poly)
    • Storage connected to
    • Garden
      Whole house
    • Energy Efficient Lighting
    • Mixture of LED and flouro tubes
    • Window Protection:
    • Awnings (external)
    • Insulation Type:
    • Under-roof
      External walls
    • Ceiling Type:
    • Polyester plus a layer of glass wool
    • Ceiling Rating:
    • R6.0
    • Under Roof Insulation Type:
    • Reflective foil
    • Under Roof Insulation Rating:
    • R0.1
    • External Walls Rating:
    • R2.0
    • External Walls Type:
    • Reflective insulation
    • All-Electric Home?
    • No
    • Renewable energy used:
    • Solar PV grid connect
    • Size of PV system:
    • 4.9kW
    • Average Daily Energy Consumption:
    • 4.5kWh
    • Cost estimate of sustainable home/features:
    • $4500
    • Estimate of annual savings:
    • $4500
    • House Size
    • 200 m2
    • Roof
    • Metal (Colorbond)
    • Wall Materials
    • Brick veneer
    • Window and Door Types
    • Awning
      Double glazing
      Low-e, films
      Sliding windows/doors
    • Universal design accessability
    • Multi-generational
    • Universal Design Features
    • 80cm minimum door opening width
      Kitchen bench/table for wheelchairs to access (75-85cm high)
      Lever handles for doors (no knobs)
      Window openings easily accessible
    • Number of bedrooms
    • 5
    • Number of bathrooms
    • 2
    • Garden / Outdoors
    • Composting
      Drip irrigation
      Edible garden
      Water wise plants
    • Waste Reduction Practices:
    • Compost all food scraps
      Swap with friends and neighbours
    • Healthy home features
    • Airtight house design
      Cross flow ventilation
      Natural light and ventilation
      No carpets

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