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> Australians in general are hesitant to use their AC or electric heaters

Anecdotal, but I don't think I know a single person here who is hesitant to use heating/AC - could just be down to the people I know, but I get funny looks when I tell people just to wrap up.

Something that did surprise me here is the near-complete lack of double glazing. Everywhere I've lived has been thin single-glazed windows which just let out all of the heat/cold. It's bizarre.

It depends a lot where you live.

I lived in Canberra, which sits in the middle of a valley so it got very cold in winter (for an Australian city) and uncomfortably hot in summer. Wikipedia tells me that lowest average low is −0.1 C in July and highest average high is 28 C in Jan. In winter heating was a necessity. And in summer owing to lack of any source of breeze AC was 'nice to have'.

I now live on the South Coast of NSW much more temperate climate 8 C to 26 C I use neither AC nor heating we have a nice coastal breeze most days during summer so is not actually that unpleasant. This is quite similar climate-wise to Sydney though you would not get cooling effect of coastal breeze if you lived there so A/c probably more desirable but I would say not essential.

Would double glazing also prevent natural cooling? In Melbourne where the temperature is variable I find the biggest problem is that after a couple of hot days it takes my apartment a day or two to cool down again. I can open the window of course, but often am unable to because of insects and/or not being home.

The worst thing I see across the country is the lack of fly screens with security screens on them. I grew up in a house with them (Southern Queensland) and the were a fantastic and free way to moderate the temperature, you could leave them open all day when it's warm or just during the day during winter and not have to worry about people breaking in.

Yeah, see my other comment. Australian builders / the whole building industry is downright ignorant and just about completely incompetent when it comes to thermal management.

Im in Sydney and I've got an AC unit from the 70s or 80s in a house I recently bought. Im very hesitant to turn it on as I know it will be super inefficient. Im hoping to replace it later in the year. But until then its layer up! unless guests are coming over.

Would it actually be that inefficient? I honestly don't know, but am curious if the tech has changed that significantly. Consider lifecycle costs (both financial and resources) before replacing it; might just need a clean and service.

In my case at least, replacing a 70s Carrier "window A/C" (that was actually embedded in a hole in the wall instead of a window) with a modern ductless mini-split with inverter-powered compressor resulted in almost 70% lower power consumption, not to mention the fact that the new unit is virtually silent.

I avoid using my AC but I'm just really cheap and don't mind suffering through heat too badly. It helps that I also work in an office fulltime so that's full HVAC and I'm not home during most days when it's bad. I also love the cold (to the extent that QLD has cold) so right now I'm in a shirt and shorts and loving it.

That reminds me of being at Melbourne airport wishing to consume the last of a bottle of Absinthe and being sad that no one had ice...

I remember that, there was a heat wave through the south of Australia and the main ice producing plant had a power failure.

We only turn on the AC when it's above 35C and only turn on the heat when it gets below 12C (inside!)

You bloody legend

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