Fan Systems


Fan systems account for 10 – 15% of industrial electricity demand, which equates to approximately 5% of New Zealand’s total electricity use.  It is estimated that 75% of fan systems contain inefficiencies where energy savings of 10 – 50% can be found with relatively low implementation cost. This equates to 420 GWh p.a. of economic electricity savings from industrial fan systems, accounting for 35% of all potential economic electricity savings within industry.

Ever wondered how much energy your site’s fan systems use? Energy NZ’s fan system auditing service, which first begins with a base-level opportunity study, can quickly answer these questions as well as identify key areas where energy saving potential lies.

For large or complex fan systems, Energy NZ can undertake an investment-level opportunity study where the total system input power and individual flow and pressure readings are recorded and analysed.

Unlike traditional energy efficiency studies, Energy NZ can then assist with the project management, implementation and temporary or permanent post monitoring of any fan system efficiency project that has been identified as part of any assessment.

As Energy NZ is a recognised EECA programme partner, we can also assist with all Government programme funding options, including funding for base-level and investment-level opportunity studies, and assistance with implementation including funding for capital costs, project management and post-implementation monitoring and reporting. The base-level opportunity study is 100% funded in most situations, giving you a zero-risk overview of potential opportunities within your fan systems.

Auditing Levels

Energy NZ’s fan system auditing services are divided into three parts, with each part being carried out in accordance with the New Zealand Fan System Audit Standard.

1. Base-Level Fan System Audits

  • Walk-through assessment, data collection and system check as per the base-level requirements of the audit standard
  • Short report produced, including identification of system efficiency improvements and where investment-level auditing work is required

2. Investment-Level Fan System Audits

  • Typically for sites which have already undergone a base-level system audit
  • In-depth data collection, ultrasonic flow loggings, electrical power quality loggings, pressure loggings and detailed calculations as per the investment-level requirements of the audit standard
  • Comprehensive report produced, including quotes from product suppliers designed to be very accurate and easy to implement

3. Fan System Implementation Projects

  • For opportunities identified through either an Investment-Level audit or feasibility study, Energy NZ can assist with potential Government funding and provide project management and post-implementation reporting and monitoring services.

For further information on Government funding options towards fan system audits and capital grants please contact us.