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Table 1 – NEV Building Ratings Scheme Summary - The Initial Minimum Reduction Levels
CATEGORY | SUB-CATEGORY | GOAL | MEASUREMENT CRITERIA | INITIAL VILLAGE MINIMUM* |
Water | Potable Water Usage | Conserve drinking water from NEV |
dam | Water efficient devices; Water effective landscaping & gardens; Use of recycled water in house; Strategies for high water demand features e.g. irrigation | 70% reduction | ||
Stormwater Greywater & Black-Water Management | Conserve drinking water; reduce stormwater, greywater, blackwater; consume recyclable surplus | Water Sensitive Urban Design (WSUD); how stormwater is harvested; ponds; rain gardens; infiltration systems; buffers incl. water tanks; swales; waterless toilets; where recycled water is utilised | 70% reduction | |
Energy | Thermal Performance | Decrease Energy usage | Passive solar house design considering orientation, windows, insulation, thermal mass, shading and ventilation | 7 stars’ minimum** |
Energy | Other Energy Usage | Decrease Other Energy usage | Building Management System (BMS); Heating & cooling methods; Hot water units; Appliances; Lighting (type, flexibility & optimizing); Standby power usage; Clothes drying | 70% reduction |
Renewable Energy | To at least meet annual demand | Photovoltaic panels | At least meet annual demand | |
Peak Power Demand | Reduce summer and winter peak loading | Standby switches/ power boards; Energy monitoring system; Basic control system e.g. timer; Remote control system (app?); Separate circuits for non-essential appliances; load shifting by Electricity Provider; have PV plus battery system; western facing panels; panel pitch to suit winter sun angle; surplus renewable energy above that required to meet the energy demand over the year | (Points are awarded for these items) | |
Materials | Materials | Lower the health & environmental impact of materials for sourcing, production and disposal | Having a minimum amount of materials; being durable; designing for ease of deconstruction at end of building life; low embodied energy; high recycled content; natural and renewable resource materials; low human health impact materials; locally sourced materials | (Points are awarded for these items) |
Waste | Waste | Domestic and construction | Recycle waste streams; reuse and recycling of construction wastes; design to minimise offcuts & waste with prefabrication, using standard sizes etc. | (Points are awarded for these items) |
| Indoor | Indoor Environmental Quality (IEQ) | Optimum ventilation & acoustics; low pollutant level | Sealing of house; daylighting; type of walling, flooring and design for the acoustic consideration of neighbours; low emission materials, control of mould and condensation | |
| Innovation | Innovation | Foster new ideas | Owners to demonstrate how elements exceed Category minimums | (Points are awarded if other Categories are exceeded) |
| Other | Other
| Adaptability; Resilience; Noise; Livability | (Points are awarded for these items) | Meet bushfire requirements; design for low noise |
Notes
* Initial Minimum reduction in the BASIX benchmark of average NSW household usage per person (in 2004).
** Owners should aim to have their dwellings achieve more than 7 stars where costs are not prohibitive. This will help to provide a higher average Narara Ecovillage Standard across all Categories.
NEV will accredit professionals who are be able to complete the Scorecard, and will keep a list of locally qualified BASIX and NatHERS persons. In some cases, the one professional may be able to complete the house plans and specification and rate the house using NatHERS, BASIX and the Scorecard.
The scorecard can be completed by either a Professional accredited by NEV to carry out the assessment and engaged by the home-owner, or by an ecovillage member who wishes to design their own home.
An Ecovillage member can try out the Scorecard. It asks questions about the final plans and specifications that are required to be submitted when you have completed your home design. Then it calculates scores which are added up to show a total. The Building Standards Working Group will continue to provide education in the use of the scorecard to members
The scorecard requires BASIX scores to be inserted as well as a NatHERS star rating obtained from a NatHERS qualified person. BASIX is the minimum NSW requirement for the design of homes. NEV requires that the AccuRate Star Rating option within BASIX is chosen, and that a minimum of 7 stars is obtained. NatHERS is the Nationwide House Energy Rating Scheme in Australia.
Useful definitions used by BASIX can be found at https://www.basix.nsw.gov.au/basixcms/basix-help-notes/definitions.htmlLink the Building Performance Scorecard
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