SR502 Household Energy End-use Project 2: Report on summer comfort, cooling and indoor temperatures (preliminary analysis) (March 2025)

The Household Energy End-use Project 2 (HEEP2) is a comprehensive national study of energy use and conditions in New Zealand homes designed to replicate the earlier HEEP study (HEEP1) undertaken in 1999–2005. HEEP2 involves a national sample of over 750 households with data collected in various ways, including self-completion and on-site surveys, in-home monitoring, and accessing metered energy data from retailers. This report presents preliminary insights from some survey and monitoring data, looking at occupant comfort and internal temperatures in summer. The survey data is derived from the in-home interview and building and appliance survey completed for 425 households throughout the country. The temperature analysis is based on a subset of 151 of these households monitored over summer 2023/24. All results are unweighted, and the monitoring data comprises only around half the HEEP2 monitored sample. These results are therefore indicative and preliminary only.

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