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Five to Six Star : Five to Six Star
7 Legend: 1F-1st floor, DS-Double sided reflective foil, SS-Single sided reflective foil Name Sunbury (Underhill) Description Single storey, 3 bedroom house. Brick veneer with tiled roof, built on concrete slab on ground. Tile and carpet floor coverings. Size 137 m2 Passive Solar Design Good - low ratio of windows to floor area reducing heat loss. Rooms well zoned that can be closed off and not heated or cooled when not in use. Meals and family areas face north, north west and south west allowing heat gain from winter sun. House Rating 5 Star 6 Star Slab Raft Raft Sub Floor Insulation SS SS Ceiling Insulation Roof R2.5 R3.5 Ceiling Reflective Foil Roof SS SS External Wall Insulation Batts R1.5 R2 External Wall Reflective Foil SS SS Internal Wall Insulation Batts No No Single Glazed Windows Yes Yes Double Glazed Windows No No Additional Requirements External wall insulation increased from R1.5 to R2 $82 Aluminium standard windows upgraded to improved aluminium windows reducing heat loss and gain through frames $600 Ceiling insulation increased from R2.5 to R3.5 $270 Entry doors sealed and exhaust fans sealed $300 Cost $1265 Cost/ m2 $9