Nett Zero Box

Nett Zero Box

Portfolio Categories: Work in progress.

The challenge of a net zero energy home in Central Otago  – currently at design phase –is primarily one of maintaining thermal  comfort throughout the temperature range between 35°C in summer and -10°C in winter. Our solution has R 6.0 and R7.0 insulation in walls and roof respectively, double glazed airlocks and a rockbin  for thermal harvesting and storage. The 32° north facing roof covering the 100 sq.m 2 bedroom home  is ideal for  summer  photo voltaic generation and loses only a few % efficiency in winter by not being normal to the midday sun in winter.  Since the main electricity  load will be refrigeration, lighting and computers,  rather than for heating, that is a minor disadvantage only. The roof  carries solar water panels also. Any prolonged period without sun will made up for with a wetback on the small space heating woodstove. More on this evolving design to come…..