HEEP was the most thorough investigation of the way that energy is used in New Zealand homes since the 1970s.
The envisaged model used physical building and appliance characteristics as well as socio-demographic factors to describe the energy consumption patterns and some of the energy services, in particular, the achieved indoor temperatures. The model was used to understand current and future national household energy requirements and as a tool to evaluate the implications of building and appliance performance changes.
Monitoring and data collection
The project commenced in 1995 with a pilot study and progressed to detailed data collection in 400 houses throughout New Zealand. The sample included households from large and small cities, urban and rural areas and both the North and South Islands from Kaikohe to Invercargill. Each house was monitored for about 11 months.
HEEP monitoring activities included a detailed occupant survey as well as a detailed house energy examination. The monitoring covered all fuel types (electricity, natural gas, LPG, solid fuel, solar water heaters) as well as temperatures in at least three locations.
Data collection was completed in 2005, and from year 9, the reports provided regional and national statistics.
Funding
HEEP was funded continuously by the Building Research Levy and at various times in various ratios by the Foundation for Research, Science and Technology, the Energy Efficiency and Conservation Authority and others.
HEEP publications
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Energy use in New Zealand households - final HEEP report
SR221 is the final report on HEEP and brings together and updates material presented in previous reports, as well as providing new analysis.
Download [PDF, 11.2MB] -
Report on year 10 of HEEP
SR155 is the year 10 report on HEEP and gives an overview of fuel types and the services they provide.
Download [PDF, 6.4MB] -
Report on year 9 of HEEP
SR141 is the year 9 report on HEEP - the first with full data from 400 randomly selected houses - and provides an overview of the entire project and the monitored houses.
Download [PDF, 5.7MB] -
Report on year 8 of HEEP
SR133 is the year 8 report on HEEP and includes background details to the development of the Household Energy Efficiency Resource Assessment (HEERA) model.
Download [PDF, 1.3MB] -
Report on year 7 of HEEP
SR122 is the year 7 report on HEEP and identifies the top four uses of electricity and natural gas - hot water (29%), space heating (22%), lighting (11%) and refrigeration (10%).
Download [PDF, 4.3MB] -
Report on year 6 of HEEP
SR115 is the year 6 report on HEEP and identifies a correlation between house age (since 1978 thermal insulation has been required) and winter evening temperatures but no correlation with house income.
Download [PDF, 1.3MB] -
Report on year 5 of HEEP
SR111 is the year 5 report on HEEP and covers the background to the research, the current year's results and information on further research.
Download [PDF, 1.8MB] -
Report on year 4 of HEEP
SR98 is the year 4 report on HEEP and discusses progress in data logging techniques and data processing.
Download [PDF, 1.2MB] -
The need for new electricity generation - the role of demand
This paper was presented at the Sustainable Energy Forum and Energy Federation of New Zealand joint 1-day seminar on government energy policy in Wellington on 16 February 2006.
Download [PDF, 27KB]