It2019s important to understand that the cost of running any heater will vary depending on the climate, how insulated your home is and other factors. However, in general, it is more expensive to run an electric heater than a gas heater.Electric heaters use more energy than gas heaters, and this costs more money to run. In addition, gas heating is often more efficient than electric heating, meaning you2019ll get more heat for your money.While it2019s always important to do your own research to find the best deal for your home, in most cases it will be cheaper to run a gas heater than an electric heater.