However, it is certainly true that poorly insulated areas will be the major loser of heat and they often merit attention before improving already well-insulated parts of the home. Switching to electric room heaters will reduce your energy bill. This is true only under some circumstances. If you have central electric heating, then using room heaters will most likely save you money. Further details online.
Electric heating is more efficient than fuel-based heating.
It's true that all, or almost all, of the electricity that goes into an electric heater is transformed to useful heat in your home. This is why electricity is so much more expensive for the consumer than direct fuels. Buying an efficient air conditioner or furnace will automatically reduce my utility bill. This is true to some extent, but you won't realize all the possible savings if the equipment is not sized or installed properly. Studies have shown that typical air conditioner and duct systems are improperly installed, wasting one third or more of the energy used by the air conditioner.