A winery in Marlborough intends to be the most sustainable winery in the country by the end of the year.
Yealands Estate in the Waitere Valley has received a grant of $80,000 from the Energy Efficiency and Conservation Authority (EECA).
It will be used to build a boiler that will convert vine prunings into energy.
Yealands Estate already has solar energy panels, insulated tanks, wind-powered electricity generators, and collection of storm water to irrigate.
Owner Peter Yealands says the new boiler will burn about 3% of the vine prunings, to heat water and glycol, reducing the winery's total carbon footprint for LPG to zero.
The boiler will be in place by the end of year.
When it is coupled with another planned power project, Mr Yealands says it will make the winery the most sustainable in the country.
Yealands Estate also grazes miniature babydoll sheep instead of mowing grass under the vines.
The winery already has carbon zero certification from Landcare Research for its sustainable wine production.