The Cooperative Research Centre for Low Carbon Living (CRCLCL) research project Mainstreaming Net Zero Energy Housing aims to improve industry understanding of Net Zero Energy Homes (NZEH) while addressing cost and consumer interest barriers. The project also provides a unique opportunity to increase collaboration between industry players such as land developers and volume builders.
Based on energy modelling conducted in the design review process and retail costings provided by the builders, initial installation costs and annual savings were calculated. The costing analysis was then conducted across a 25-year lifespan, aligning with previous research on high performance buildings, as well as placing the analysis over a similar time period to a standard mortgage. The analysis used energy prices for each of the four case study locations and accounted for maintenance and replacement costs of appliances. Analysis was conducted across five different electricity market scenarios including increased electricity prices, continuation of feed-in tariffs, and elimination of feed-in tariffs.
The key findings are:
Solar PV and Heat Pump or Evacuated Tube hot water systems are the two most cost effective upgrades across all case studies. Both of these upgrades show payback within 10 years at current energy prices.
Thermal shell upgrades provide effective and meaningful cost reductions, however increased installation costs compared to the standard house design pushes payback beyond 10 years. In most cases, given the extended lifespan of the thermal shell, these savings outweigh the costs over the 15 year analysis period.
NPV of NZEH upgrades is positive under energy price increase scenarios.
This is the list of the top 50 documents world wide which can inform policy to do with building energy improvements for commercial building retrofits.Read more
This is the current list of the top 50 open resources world wide chosen by experts, as the resources can and should influence building policies toward better energy efficiency and environmental outcomes in design and construction.Read more
The Cooperative Research Centre for Low Carbon Living (CRC LCL) research project Mainstreaming Net Zero Energy Housing aims to improve industry understanding of Net Zero Energy Homes (NZEH) while addressing...
The Australian Building Codes Board (ABCB) has been requested to consider potential stringency changes to the energy efficiency provisions in relation to commercial buildings in the 2019 edition of the...
This strategy document is designed to accelerate action, with four clearly defined steps: differentiate sustainable housing in the market; train and reward the construction industry; build awareness; and broadcast the...