The National Construction Code employs Volume 1 Section J of the Building Code of Australia (BCA) to stipulate energy efficiency measures that must be taken during the proposed development of a building plan. It’s objective is to reduce greenhouse gases through sustainable actions via reduced energy consumption. In order to meet these requirements, a report must be generated based on the proposed design of the development, and this is what is created by us. The two main approaches to achieving this, namely through a ‘Deemed-To-Satisfy’ (DVC) approach or through Verification using Energy Modelling.