Windflow Technology is a company based in Christchurch

Christchurch

Christchurch is the largest city in the South Island of New Zealand, and the country's second-largest urban area after Auckland. It lies one third of the way down the South Island's east coast, just north of Banks Peninsula which itself, since 2006, lies within the formal limits of...

, New Zealand known for its unique wind turbine

Wind turbine

A wind turbine is a device that converts kinetic energy from the wind into mechanical energy. If the mechanical energy is used to produce electricity, the device may be called a wind generator or wind charger. If the mechanical energy is used to drive machinery, such as for grinding grain or...

 gearbox design.

It was listed on the New Zealand Stock Exchange on 2 December 2003. In October 2008, Mighty River Power purchased a 19.95% share of Windflow Technology.

The operation of a Windflow Technology turbine installed at Gebbies Pass near Christchurch encountered opposition from local residents who raised concerns about noise. The neighbouring valley was very sheltered, and therefore had very little background sound. Because of this, Windflow offered to comply with low sound levels of 30 dBA, 10 dBA lower than the District Council's usual requirement of 40 dBA. However, sound levels were at 35 dBA, so Windflow modified the gearbox, which reduced the turbine's sound. Sound levels were again measured and this time be within the requirement of its resource consent

Resource consent

A resource consent is the authorisation given to certain activities or uses of natural and physical resources required under the New Zealand Resource Management Act . Some activities may either be specifically authorised by the RMA or be permitted activities authorised by rules in plans...

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Windflow Technology set up New Zealand Windfarms to own and run the Te Rere Hau Wind Farm

Te Rere Hau Wind Farm

Te Rere Hau is a wind farm owned and operated by NZ Windfarms Ltd. It is situated on the Tararua Ranges, approximately 11 km east of Palmerston North in New Zealand....

 near Palmerston North

Palmerston North

Palmerston North is the main city of the Manawatu-Wanganui region of the North Island of New Zealand. It is an inland city with a population of and is the country's seventh largest city and eighth largest urban area. Palmerston North is located in the eastern Manawatu Plains near the north bank...

. Initially this was wholly owned but now has been completely sold off. Windflow Technology supplied the wind turbines for this wind farm, and are also contracted to supply turbines for Mighty River Power's proposed Long Gully Wind Farm

Long Gully Wind Farm

Long Gully Wind Farm is a proposed wind farm in Wellington, New Zealand. Long Gully is an area adjacent to the Karori Wildlife Sanctuary.The proposal involved using turbines manufactured by the New Zealand company Windflow Technology Limited...

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The company achieved ISO 9001:2000 certification for the design and production of its Windflow 500 wind turbine in 2008. In September 2010 the Windflow 500 gained Class 1A of the International Electrotechnical Commission (IEC) design standard IEC 61400-1 (edition 3) through Lloyd's Register

Lloyd's Register

The Lloyd's Register Group is a maritime classification society and independent risk management organisation providing risk assessment and mitigation services and management systems certification. Historically, as Lloyd's Register of Shipping, it was a specifically maritime organisation...

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In September 2011, Windflow Technology signed a contract to install a Windflow 500 turbine on the island of Shetland