The Palmerston North Rescue Helicopter is now the Grassroots Trust Rescue Helicopter.
The new name was revealed at a function at the helicopter's hangar at Palmerston North Hospital last week.
In a three-year agreement, Grassroots Trust is providing $750,000.
Philips Search and Rescue Trust is the charity responsible for fundraising and promotion of the rescue helicopter. Trustee Stewart Davies outlined the service's history.
In 1990, then mayor Paul Rieger got together a working group of interested parties. The next year, Philips was selected as the operator. The service was initially based at the airport with one pilot.