Outside of the main cities, no one is on mains gas (not everyone, us included is even on mains water or sewerage)
Our log burner
Is pretty efficient, it also has a wetback for our hot water. If we light it, we burn about 4 logs an evening.This heats up the sitting room, dining room, kitchen and bedroom and also if it is on a little bit longer than usual the bathroom (on the other side of the wall to the log burner)
It is not a logburner that can be used in a city though, as it would not pass the emmissions test, but not a problem to us here as out nearest neighbour is 3km away.
It is possible to get central heating installed and as we already have a wetback I am thinking it would be fairly easy to put radiators in to heat the other two bedrooms.However we are waiting till we have been in here a full year before changing any heating. We have been told that we are frost here (yes and on the south island) so we may not need any better heating.