Energy Efficiency Compliance
The Study provides energy efficiency compliance certification services for residential and commercial, new buildings and alterations / additions. We provide assessments, advice to meet BCA compliance and increase energy efficiency, and certification for CDC / building permits
RESIDENTIAL / NATHERS ASSESSMENTS
The NatHERS (Nationwide House Energy Rating Scheme), also called 'six-star', is the most common pathway for compliance for new homes. This method of compliance can be used on all single residences, apartments, and other dwellings. It involves modelling your design in accredited software, which simulates the home through a full year, and calculates the expected heating and cooling loading to retain thermal comfort throughout the year. There is an allowable maximum for each climate zone, but the software is also a good tool to test changes to increase efficiency higher if your goal is no artificial heating and cooling!
RESIDENTIAL / VERIFICATION USING A REFERENCE BUILDING
The verification pathway is a BCA alternative solution, and involves a more complex method of compliance. This pathway is not offered by the majority of energy assessors due to the complexity of the process. This method of compliance is particularly useful where the design is pushing boundaries or where thermal mass has not been used - particularly in cold climates. This method can only be used on class one (single dwellings) and cannot be applied to apartments.
RESIDENTIAL / ELEMENTAL (DEEMED-TO-COMPLY)
The elemental compliance pathway is a check-box type method of compliance. Minimum levels of insulation must be met, and the windows compliant in a calculator, but there is no room for trade-offs. Typically, this method is used for alterations and additions only
COMMERCIAL / SECTION J (DEEMED-TO-SATISFY)
Commercial buildings are assessed against minimum levels of insulation, and the glazing is assessed in a calculator. The glazing is assessed by facade area, which can work for, or against, the project.
COMMERCIAL / JV3
The JV3 pathway is similar to the verification pathway for residential buildings. JV3 compliance involves thermal modelling of the proposed building, and comparison of the heating/cooling loads compared to a reference building - which needs to comply with the Deemed-to-Satisfy requirements of the BCA. This method is useful where the DTS requirements are too restrictive for compliance - for instance, where you may have excessive glazing on one elevation, or a wall type such as rammed earth.