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Energy efficiency
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Thermal performance
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- Insulate ceilings to the Best Practice standard or higher as outlined in SNZ PAS 4244:2003.
- Insulate under the floor (where possible) to as high a standard as practicable
- Where renovations are already planned, install wall insulation to meet Best Practice as outlined in SNZ PAS 4244:2003.
- Where glazing or windows are in need of replacement, install low-e double glazing
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Space heating
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- Install a pellet burner or low-emission wood burner appropriately sized for the dwelling or, if not possible, an Energy Star rated heat pump with a coefficient of four or better.
- Heat transfer systems, if required, to ensure heat is supplied to all bedrooms and living spaces
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Hot water
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- Install a solar hot water system or heat pump hot water system
- Install low-flow shower heads (7-9 L/min)
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Energy efficient bundle
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- CFL lightbulbs, draught stopping of major draughts, polythene under floor, washing line if there is none
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Water efficiency
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Low-flow fittings
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- Replace full-flush cisterns with AAA-rated dual-flush (3/6 litre) cisterns or replace whole toilet with AAAA-rated dual-flush (3/4.5 litre) toilets
- Put flow restrictors on kitchen, bathroom and outdoor taps
- Plumbing check – fix leak
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Rainwater tanks
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- 2000L (5000L if sufficient space) tank to supply outdoor uses, toilet and washing machine supply
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Greywater reuse
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- In areas of low rainfall, or where on-site sewage treatment systems are in place, reuse of greywater for outdoor uses or toilet
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Indoor environment quality
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Ventilation
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- Install a showerdome or mechanical ventilation system in bathroom – vented to outside
- Install a rangehood in kitchen – vented to outside
- Provide venting to outside for any driers
- Install strip-passive vents in windows in living spaces or security stays to enable windows to be left open
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Waste
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Composting
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- Provide worm farm or compost bin
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