Get advise and perhaps subsidy for old house stock. I.e insulation in walls, double glazing etc.
1000% Energy efficiency is often -ve cost in that you should have installed it years ago to realise benefits earlier. We need a building energy standard like most other countries. Need special thought to renters, social housing and strata. Need some kind of building audit powers. Also new houses often don't have eaves, allowing for solar heat gain.... this is a bad design for energy efficiency.
Sorry - meant Insulate
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