Current regulatory pathways to compliance in energy efficiency for Australian housing are via provisions in the National Construction Code (NCC). This paper first identifies performance evaluation criteria set out in the code presented as a comparative analysis across the different methods of achieving compliance.
Since 2010/2011 changes to the national construction code require newly constructed houses to perform at a minimum Nationwide House Energy Rating Scheme (NatHERS) energy rating of 6 stars (or BASIX equivalent in NSW), which determines the predicted thermal energy a house requires to maintain thermal comfort, given its location. This initiative aims to improve the energy performance of new housing stock in the residential sector, however, many existing houses were built before the introduction of these regulations.
The rating of buildings using thermal models represents a contrasting regulatory approach to prescriptive measures to improve the energy efficiency of buildings. This paper investigates the relationship between measured household energy use for thermal comfort purposes and the modelled thermal energy calculated under the Nationwide House Energy Rating Scheme (NatHERS), which is used for the regulation of minimum energy performance standards for new housing in Australia.
This paper investigates the use of actual monitored household energy as an indicator of the thermal efficiency of a dwelling and subsequently rating of the building thermal performance. The paper reviews evaluation methods used internationally for both building thermal efficiency and building energy labelling and presents results from two discrete studies in South Australia on monitoring actual household energy consumption.