Robs Lennox Head Project Home All Electric Retrofit 2020

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Location
Lennox Head NSW 2478
    • Housing Type:
    • Standalone House
    • Project Type:
    • Retrofit/addition
    • Open with support of
    • Zero Emissions Byron Limited

About Robs Lennox Head Project Home All Electric Retrofit

PROJECT HOME ALL ELECTRIC RETROFIT. Due to local housing stock conditions in NSW Northern Rivers a smart retrofit was considered an easier and quicker option than a new build on a standard block.

The objective was to create a low maintenance, net zero energy and net zero emission food productive retirement home by retrofitting one of the better designed project homes. We chose a north facing bungalow on around 600 sq m of land. The roof pitch and angle is ideal for solar PV.

As the house is sited close to the rear southern boundary there is around 200 sq m of plant able flat north facing fertile red soil, of the type common to the NSW Northern Rivers. There is only one step up in to the house from the street making the home almost old age proof! With 10 kw of solar and the 13.5 kwh Tesla Powerwall 2 the house has been self powered 100% since full system commissioning late August 2020. In the sub tropics solar heat gain from typically inadequate project home quality eves has been solved by installing external drop down blinds which allow light in but not heat.

Both outside verandas will be shaded by a constructed timber pergola fitted with fixed louvres and assisted by passion fruit vines. All internal windows were fitted with good quality roller blinds to retain daytime winter solar heat gain. Also large sliding doors were fitted with polyester based full length curtains. Gas instant hot water heater and meter removed easily by gas plumber and donated to Byron Council recycling centre. Four low quality metal fans removed (to recycling) and replaced with Haiku L white resin 1.3 m brushless DC fans, purchased during EOFY sale.

Gas cooktop removed and replaced with Bosch induction cook top which even displays power used when switched off. All grass removed and soil landscaped and mulched to make way for an mainly edible garden with raised beds.

SUSTAINABLE FEATURES

Years Open
2020
ENERGY AND WATER EFFICIENT FEATURES
    • Energy efficiency:
    • Draught proofing
      Efficient lighting
      Efficient appliances
      Energy monitoring
    • Passive heating cooling:
    • Cross ventilation
      External planting
      Shading
    • Active heating cooling:
    • Ceiling fans
      Split system airconditioner
    • Water heating:
    • Hot water heat pump
    • Water harvesting and saving features:
    • Rainwater storage - Above ground
      Worm farm septic tank system
      Low flow shower heads
      Low flow taps
      Drip irrigation
    • Average water consumption per day:
    • 0.16kL
    • Above ground rainwater storage Type:
    • plastic tank
    • Above ground rainwater storage Size
    • 5,000L
    • Energy Efficient Lighting
    • LED lights throughout
      Natural daylight
    • Window Protection:
    • Blinds
      Shutters
INSULATION SPECIFICATIONS
    • Insulation Type:
    • Under-roof
      Internal walls
    • Under Roof Insulation Type:
    • Reflective foil
RENEWABLE ENERGY SPECIFICATIONS
    • All-Electric Home?
    • Yes
    • Renewable energy used:
    • Energy storage/battery
      Solar PV grid connect
    • Size of PV system:
    • 10.075
    • Average Daily Energy Consumption:
    • 3.89
COSTS AND COST SAVINGS
    • Total cost of home when constructed:
    • NA
    • Cost estimate of sustainable home/features:
    • $34,228
    • Estimate of annual savings:
    • $2,560
HOUSE DESIGN SPECIFICATIONS
    • House Size
    • 170 sq m not including garage
    • Roof
    • Tiles (Concrete)
    • Wall Materials
    • Brick veneer
    • Window and Door Types
    • Sliding windows/doors
    • Universal design accessability
    • Multi-generational
    • Universal Design Features
    • 80cm minimum door opening width
      Flush thresholds (no lip) to all external doors
      Lever handles for doors (no knobs)
      Minimum 110cm wide hallways
      No stairs/steps
      No Corner cupboards
      Semi recessed basins
      Shower head on rail for various heights
      Slip resistant flooring
    • Number of bedrooms
    • 4
    • Number of bathrooms
    • 2
GARDEN AND WASTE REDUCTION
    • Garden / Outdoors
    • Community vegetable garden
      Composting
      Drip irrigation
      Edible garden
      Local indigenous plants
      Orchard
      Organic
      Native plants
      Worm farm
    • Waste Reduction Practices:
    • Compost all food scraps
      Make jams/conserves
      Plastic free household
      Recycle
      Repair
      Take own containers to the supermarket and for take away food
HEALTHY HOME FEATURES
    • Healthy home features
    • Low VOC paints/sealer/varnish

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