Case studies

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.

Fitting a variable-speed drive to a fan motor for a boiler has already saved Juken Nissho's Wairarapa mill $20,000 on a $50,000 investment made a year ago.

Compact fluorescent lamps in sizes up to 180 watts can replace mercury vapour and metal halide lamps up to 400 watts - using less power, producing less heat and switching on instantly.

This case study looks at how four different New Zealand businesses - Tegel Foods, Craggy Range, Clive Scouring and Southern Lakes Laundries - have applied heat recovery technology recently. There are lessons here for businesses in many other fields - particularly for food and
beverage manufacturers but anywhere heat or cooling is required in a reasonably large quantity.