RUNS ON SUN (and rain) 2020

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Location
Gooseberry Hill WA 6076
    • Housing Type:
    • Standalone House
    • Project Type:
    • Retrofit
    • Open with support of
    • Sustainable Energy Now

About RUNS ON SUN (and rain)

Less CO2, more H2O! 

This is a retrofit of a double-brick and tile home built in 1971. The orientation is north–northwest by north, and the home was built to be solar passive. Over the last twelve years, the passion has been in taking progressive steps towards making the property and transport more sustainable, reducing the carbon footprint and aiming to achieve carbon tiptoes.

The metre-long eaves on the north side of the house provide shade to the windows in the summer, whilst allowing warming sunshine inside in winter.

The roof tiles were originally a dark-green colour. These have been treated with Insulpaint in an off-white colour, which has significantly reduced the summer temperature in the house.

The 5.5kW solar system is grid-connected, exporting clean renewable energy. The 5.8kW solar system is hybrid off-grid. It does not export to the grid. When the sun is shining, this system can power the house and/or charge the electric vehicle/s and/or charge the batteries. When there is no solar power, the batteries can supply the house load. If there is no solar or battery power, electricity can be taken from the grid. Over the last twelve years, in excess of a net 30,00kWh of renewable energy have been exported to the West Australian grid (the SWIS). Over the last eight years, I have not had to pay an electricity bill.

The all-electric vehicles mean that I do not buy petrol. Garden and power tools ( lawnmower, etc ) are re-chargeable battery electric.

With a total roof area of 240m2 (including all sheds/outbuildings), rain water is harvested via custom made, extra capacity gutters (to cope with tropical type storms). To try to keep the water as clean as possible, the following systems are fitted: leaf gutter guard, double filter screen rain heads, ‘first flush’ units, and ‘Maelstrom’ cyclonic type filters. Total storage capacity is 112,000L. This is used for bush fire defence via roof top sprinklers, vegetable garden, fruit trees, general garden, and, after further filtration, for kitchen and drinking.

Part of the vegetable garden incorporates salvaged baths on plinths. Shade-cloth protects the vegetables in summer, but allows in the winter sun. Kitchen scraps, vegetables and grass cuttings are all composted. There are two mature fruit trees – lemon and nectarine. Young fruit trees include mandarin, orange, apricot, and apple..

This home demonstrates that solar PV can be good for both the Pocket and the Planet.

This home is supported by Sustainable Energy Now.

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SUSTAINABLE FEATURES

Years Open
2018
2019
2020
ENERGY AND WATER EFFICIENT FEATURES
    • Energy efficiency:
    • Efficient lighting
      Efficient appliances
      Energy monitoring
    • Passive heating cooling:
    • Cross ventilation
      Passive solar designed home
      Thermal mass

    • Passive heating cooling:
    • A cellar, of varying heights throughout, is cool in summer and warm in winter
    • Active heating cooling:
    • Ceiling fans
      Split system airconditioner

    • Active heating cooling:
    • A single split system air conditioner serves the kitchen, which has a raked ceiling, and is vented by clerestory windows. There is a slow combustion wood heater, with much of the wood harvested on the block.
    • Water heating:
    • Solar hot water (flat panel)
    • Water harvesting and saving features:
    • Rainwater storage - Above ground
      Rainwater storage - Underground
      Stormwater management
      Low flow shower heads
      Low flow taps
    • Average water consumption per day:
    • 136 ltrs
    • Underground rainwater storage type:
    • Poly tanks ( new )
    • Underground rainwater storage Size:
    • 100,000 ltrs
    • Above ground rainwater storage Type:
    • Poly tanks ( re-cycled )
    • Above ground rainwater storage Size
    • 12,000 ltrs
    • Energy Efficient Lighting
    • Natural daylight
    • Electric Vehicle Type
    • 2012 Nissan LEAF (49,000kms ) and 2008 Vectrix all-electric motor bike (83,000kms )
    • Window Protection:
    • Adjustable Shading
      Awnings (external)
      Drapes/curtains
      Eaves
      Pelmets
SUSTAINABLE & RECYCLED MATERIALS
    • Sustainable materials:
    • Timber floor boards - healthier to walk on, and avoids concrete. This also provides an under-floor airspace that retains a very even temperature throughout the year.
    • Recycled and reused materials:
    • Aggregate
      Bricks
      Insulation
      Pallets
      Paving
      Rocks/stone
      Stairs
      Timber
      Wine barrels/crates
INSULATION SPECIFICATIONS
    • Insulation Type:
    • Under-roof
      Ceiling
      Floor
    • Ceiling Type:
    • Bulk – glass wool
    • Ceiling Rating:
    • R3.5
    • Floor Type:
    • Bulk – polystyrene board
    • Floor Rating:
    • R2.0
    • Under Roof Insulation Type:
    • Reflective foil
RENEWABLE ENERGY SPECIFICATIONS
    • All-Electric Home?
    • No
    • Renewable energy used:
    • Energy storage/battery
      Solar PV grid connect
      Solar PV off-grid
    • Size of PV system:
    • 11.3 kW + 22 kWh storage battery
    • Average Daily Energy Consumption:
    • 12 kWh
COSTS AND COST SAVINGS
    • Total cost of home when constructed:
    • $17,000 (in 1971)
    • Cost estimate of sustainable home/features:
    • $30,000
    • Estimate of annual savings:
    • $6000
HOUSE DESIGN SPECIFICATIONS
    • House Size
    • 130m2
    • BAL Rating
    • BAL – Low: There is insufficient risk to warrant specific construction requirements
    • Roof
    • Tiles (Clay)
    • Wall Materials
    • Double brick
      Lightweight construction (timber frame)
    • Window and Door Types
    • Awning
      Clerestory windows
    • Universal Design Features
    • 80cm minimum door opening width
      Shower head on rail for various heights
      Slip resistant flooring
      Tapware to be easily accessed from outside the shower
    • Number of bedrooms
    • 3
    • Number of bathrooms
    • 1
GARDEN AND WASTE REDUCTION
    • Garden / Outdoors
    • Bird-nesting boxes
      Composting
      Edible garden
      Green roof
      Local indigenous plants
      Orchard
      Organic
      Native plants
      Water wise plants
    • Waste Reduction Practices:
    • Compost all food scraps
      Make jams/conserves
      Pickle and preserve food
      Recycle
      Repair
HEALTHY HOME FEATURES
    • Healthy home features
    • Cross flow ventilation
      Indoor plants for air filtration
      Natural light and ventilation

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