We got rid of our gas heater a while back when we got reverse cycle air conditioning

We have an open plan living area, the aircon heats the whole lot up in under 5mins on a frigid morning have the temp set low 22-23º so it doesn't suck the electrickery and it just maintains a nice comfortable temp.
We got rid of the gas heater as it would just burn up all the oxygen in the house, couldn't open a window because of all the stinkin wood fires in the area.
Driving home at night in winter is like driving through "foggy hollow" down here, you'd swear there was major bush fire each night.