Case studies

Setting and implementing an energy management policy has helped ANZ National Bank achieve significant energy savings.

Part of their energy management programme, evaluated the lighting used in their premises. Installing more efficient lighting tubes has created a direct energy saving worth around $50,000 a year. Further savings were achieved in electrical maintenance, where costs have dropped from $150,000 a year to around $10,000.

Pacific Wood Products (PWP) installed Ecogate control systems on their extraction fans. Through the use of air flow control gates and a variable speed drive connected to each fan that adjusts to meet the actual workload, PWP reduced their energy use substantially.

Energy savings were immediate from week one. The system will be paid for in be just over 4 years, and long-term they benefit from lower energy bills. Equally important, PWP will cut its annual CO2 emissions by 45 tonnes.

Southern Lakes Laundries has installed a high-efficiency heat exchange unit for their main industrial washing machine that is delivery savings of up to $45,000 a year.

Southern Lakes Laundries retrofited the heat exchanger into their existing equipment without any disruption to their 364 day a year operation.

The project payback period is approximately 2 years.

After having an energy audit done and carrying out the most cost-effective recommendations, the Auckland site is spending $40,000-$50,000 less a year on electricity a year. And it is considering more audits throughout the other branches.