Australia was slow to introduce minimum building standards for energy efficiency. The Nationwide House Energy Rating Scheme (NatHERS) only came into force in 2003.
Older homes tend to have very poor energy efficiency. They need more electricity or gas to heat to a comfortable temperature, and more electricity to cool them in summer. This can get expensive.
We now suspect the energy efficiency of a person’s home also shapes how they respond to electricity rates that vary with time of use.
