Zero net energy (ZNE) is a concept used in building design and construction that refers to a building that produces as much energy as it consumes on an annual basis. ZNE buildings are designed to be highly energy-efficient, using a combination of passive and active energy-saving strategies, such as solar panels, energy-efficient lighting, and insulation, to minimize energy consumption.

In a ZNE building, the energy that is consumed is offset by the energy that is produced, typically through the use of renewable energy sources like solar, wind, or geothermal power. This means that over the course of a year, the building produces as much energy as it consumes, resulting in a net zero energy use.

ZNE buildings are becoming increasingly popular as a way to reduce the environmental impact of buildings and promote sustainability. They are commonly used in residential and commercial buildings, and are often designed to be aesthetically pleasing and functional as well as energy-efficient.