I'm in Adelaide, Australia.
I've got the regulator open about 2/3 to 3/4 of the maximum possible pressure (2.8kPa is the listed max pressure, and Australian regulators don't seem to have pressure gauges to be more precise). None of the photos of the reg on the gas tank (8.5kg) are uploading properly.
The heat issue is when the doors are closed and open. This was the first time I tried it out and after an hour I figured I'd stop burning gas and ask for help.