This is probably a question to non-Victorians. Not sure how harmful it is using an unflued LP gas heater? They go in a bit of detail with some facts in the NSW Health website,
https://www.health.nsw.gov.au/environment/factsheets/Pages/u…
But why would they still allow it to be sold? Is it like it is not that harmful if used in an open area like a living room? Or is it that it could be used with a CO/NO2 detector or something?
What is better ultimately a flued or an unflued gas heater?
It's safe when used correctly. But using it correctly means leaving a window open for air flow, and that means a chill draft coming in and wasting energy.
Go with a flued, or even cheaper to run, a reverse cycle air-con.