Hawthorn House 2020

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Location
Hawthorn VIC 3122
    • Housing Type:
    • Standalone House
    • Project Type:
    • Renovation
    • Builder
    • Smart & Cain Builders Pty Ltd
    • Designer
    • Ande Bunbury Architects

About Hawthorn House

We Renovated a west-facing Victorian cottage on a small block, with very limited access to north sun, to make it more energy efficient.

The main aims of our renovation were to:

  • Eliminate greenhouse gas emissions from our energy consumption
  • Improve thermal comfort
  • Save on home running costs

This involved adding insulation to walls, under the floor, and to ceiling of those parts of the house that were otherwise unmodified, in addition to insulating the new sections of the home.

All windows in the living areas are now double-glazed, leaving only original Victorian windows at the front of the house single-glazed. Clerestory windows also added for winter solar gain.

There is an electric heat pump for hydronic space heating and for hot water, replacing gas, as do the induction cooktops.

This house was certified as with 6 stars using the Victorian Residential Efficiency Scorecard star rating.

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SUSTAINABLE FEATURES

Years Open
2019
2020
ENERGY AND WATER EFFICIENT FEATURES
    • Energy efficiency:
    • Draught proofing
      Efficient lighting
      Efficient appliances
    • Passive heating cooling:
    • Shading
    • Active heating cooling:
    • Ceiling fans
      Heat pump
      Hydronic
    • Water heating:
    • Hot water heat pump
    • Energy Efficient Lighting
    • LED lights throughout
      Natural daylight
      Skylight
    • Window Protection:
    • Deciduous tree/vegetation
      Drapes/curtains
      Honeycomb blinds
      Pelmets
SUSTAINABLE & RECYCLED MATERIALS
    • Sustainable materials:
    • Recycled timber floorboards (Spotted Gum)
    • Recycled and reused materials:
    • Doors
      Timber
INSULATION SPECIFICATIONS
    • Insulation Type:
    • Ceiling
      External walls
      Floor
    • Ceiling Type:
    • Bulk – glass wool
    • Ceiling Rating:
    • R4.0 batts, overall rating R4.65 in old part of house, overall R5.46 in new areas
    • Floor Type:
    • Old timber-floored area of house: Icynene spray foam. Old concrete slab area of house, new slab edge insulation
    • Floor Rating:
    • Product R2.6, overall R3.48
    • External Walls Rating:
    • R2.5 (products). Overall dbl brick R2.93; new timber R3.25; old weatherboard R2.93
    • External Walls Type:
    • Outside existing double brick: Kingspan Kooltherm. New timber: glass wool batts. Old weatherboard walls: Icynene spray foam
RENEWABLE ENERGY SPECIFICATIONS
    • All-Electric Home?
    • No
    • Renewable energy
    • Solar PV grid connect not yet installed. This will be done this year, but maybe not in time for sustainable house day.
    • Average Daily Energy Consumption:
    • Post renovation: Electricity 8.4 kWh/person/day, Gas negligible. [ Pre reno: Elec 4.5 kWh/person/day, Gas 15.9 kWh(57 MJ)/person/day ]
COSTS AND COST SAVINGS
    • Total cost of home when constructed:
    • $550,000
    • Cost estimate of sustainable home/features:
    • $40,000
HOUSE DESIGN SPECIFICATIONS
    • House Size
    • 150m2
    • BAL Rating
    • BAL – Low: There is insufficient risk to warrant specific construction requirements
    • Roof
    • Metal (Zincalume)
    • Wall Materials
    • Double brick
      Timber
    • Window and Door Types
    • Clerestory windows
      Double glazing
      Skylights
      Sliding windows/doors
    • Number of bedrooms
    • 3
    • Number of bathrooms
    • 2
GARDEN AND WASTE REDUCTION
    • Waste Reduction Practices:
    • Compost all food scraps
      Recycle
HEALTHY HOME FEATURES
    • Healthy home features
    • Low VOC paints/sealer/varnish
      Natural light and ventilation

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