Why so many Australian homes are either too hot or too cold

Much of Australia is enduring the coldest start to winter in decades. But chances are the reason you're cold is not only due to a polar air mass sweeping the country, but because millions of Australian homes aren't well insulated.The average Australian home built before 2003 averages just 1.8 stars on a scale from zero to 10 stars under the Nationwide House Energy Rating Scheme (NatHERS). Homes with zero stars provide little to no protection from the outside climate. On the other end of the spectrum, 10-star homes require little-to-no heating or cooling.Estimated dwelling stock is derived from the 2001, 2006 and 2011 census.Dwelling stock for the years between each census are estimated by averaging the number of dwellings added in the period between the census.The data does not factor in dwelling removals or renovations.Star data since 2016 based on actual Nationwide House Energy Rating Scheme (NatHERS) certifications data from the CSIRO. Continue reading...