The large internal masonry feature wall pictured below helps to regulate the temperature in the same way as the concrete slab floor. The floorplan below shows how a large amount of north facing glazing was incorporated. This maximises heating from the sun during winter. The windows also take advantage of spectacular views, and are double glazed to reduce the amount of solar heating lost. Indoor temperatures range from a maximum of 28 C during extremely hot summer weather down to a minimum of 17 C during winter.
Some additional heating is required in winter.
The house rates 60 points for energy efficiency on the VicHERS rating program, which is at the top end of the rating scale in terms of energy efficiency.