Whilst gas has been a very popular heating method in the past, with the rising cost of gas and increasing efficiency of air conditioners (by using technology like inverters), many people are turning to air conditioning for heating their homes. By doing so, it is likely they are saving hundreds of dollars off their energy costs.
Electric heaters are the most common form of home heating, they are a cheap initial outlay and effective. The problem with electric heating is that it is very inefficient. You could pay upwards of ten times your energy costs using electric heaters over reverse cycle air conditioning.
Safety is something every home should consider when it comes to heating, unfortunately, both electricity and gas have significant concerns that need to be addressed, gas is a combustional substance and can lead to carbon dioxide risks, electric heaters are a common cause of household fires during Winter.