It seems like you might be asking about the difference between a gas thermostat and an iron. These two items are completely different and have nothing to do with each other.

* Gas thermostat: This is a device used to control the temperature of a gas heating system (like a furnace or boiler). It senses the temperature of the room and turns the gas heating system on or off to maintain a set temperature.

* Iron: This is a household appliance used to press fabric and remove wrinkles. It heats up to a certain temperature and is used to smooth out clothes.

Let me know if you were asking about something else, or if you'd like to learn more about gas thermostats or irons.