Energy Efficient House Design
Features of this Low Energy House Design
- The long axis of the house runs east to west so that a large area of glazing can be provided on the north wall.
- Minimum glazing on east and south walls and no glazing on the west wall.
- North facing windows protected in summer by shade battens or deciduous vines on pergola.
- Concrete slab-on-ground with edge beam insulation - acts as a heat sink in summer and a heat store in winter.
- Dark ceramic or quarry tiles on floors in living areas.
- Dense evergreen planting next to the west wall to provide shade against the hot summer sun and a wind barrier against cold winter winds.
- Front door protected from prevailing south westerly winds in winter.
- Carport on south side creates a pocket of cooler air for summer cross ventilation.
- Metal deck roof with R3.5 batts on ceiling and R1.5 blanket with double sided reflective foil laminate insulation under roofing.
The 3 most important concepts are
1. Glass
- An energy efficient house has larger windows facing north to capture the Sun's free solar energy.
- North facing windows are the most important in your home. They can gain more heat during the day than they lose at night and make your home bright and cheerful.
- Design them to admit sun’s warmth in Winter.
- Appropriate width eaves can reduce overheating in Summer
- South facing windows are also important but not from a heating point of view.
- They are useful for admitting natural light and to allow cross ventilation during summer.
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2. Mass
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- Have plenty of mass to absorb and store the Sun's energy for use when the sun isn't shining!
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3. Insulation
| Once your home is cosy and warm, adequate insulation will keep the heat from escaping. |
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Other sources of information
Hobart City Council
Your Home ( A joint initiative of the Australian Government and the design and construction industries.
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