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Understanding Energy and Water Use in New Zealand Non-residential Buildings – an ad hoc survey
*Nigel Isaacs, BRANZ Ltd 
John Jowett,  
Kay Saville-Smith, CRESA Ltd 

Keywords: Building Survey, Energy Use, Energy Monitoring, Non-Residential Buildings

Understanding resource flows in non-residential buildings will be crucial to meet greenhouse gas emission reduction targets, improve building codes and reduce operational costs.

Traditional economic statistics track flows of money, people and goods. Buildings are essential to the economy, but one building can play many different economic roles. Regular censuses cover only residential uses, so for other uses it is necessary to create a sample frame from available resources which can vary from country to country.

The Building Energy End-Use Study (BEES) is a six-year national study of non-residential building utility use. The sample frame was developed from the national property taxes database. Based on the legal description, it exists to permit trading of land and/or whole or parts of buildings. A non-residential building (or group of buildings) may have one or more legal titles and there may be no obvious relationship between ownership and use, creating a complex problem to track energy or water use.

The paper describes the development of a non-residential building sample frame; building selection; data collection by web research, site visits and phone survey; and preliminary data analysis.