New Zealand has awarded two hospital redevelopment project contracts worth $73.7m (NZ$99.5m) to Mainzeal Property and Construction.

The firm has been awarded a NZ$83m contract to redevelop Rotorua Hospital and a NZ$16.5m contract for the phase one redevelopment of Bowen Hospital in Wellington.

For the redevelopment of Rotorua hospital, Mainzeal will provide sustainable construction through energy-saving features such as the use of geothermal for hot water and space warmth generation.

The use of absorption chillers that use geothermal heat rather than electricity is also being considered, which will significantly reduce energy expenses, Mainzeal said.

The new Bowen Centre will be equipped with specialist consulting rooms, a new endoscopy suite, improved radiology services and a larger car parking area.