J1P1 refines the intention of J1O1. A building, and its services, is required to use energy efficiently so that the greenhouse gas emissions associated with its operation are minimised. This is subject to the intended use of the building and the necessary level of occupant comfort. For buildings that are air-conditioned, the amount of energy has also been quantified.

The term “regulated energy consumption” has been defined to clarify the portion of a building’s energy use that is required to be less than the quantified value. This includes the energy used for air-conditioning, heated water, artificial lighting and lifts, minus the amount of renewable energy generated and used on site.