Gas heating systems, as well as oil heating systems, will typically rely on boilers to burn the fuel required to heat water around the home.
As such, this hot water is then able to circulate throughout devices such as home radiators, or in the pipes beneath the ground to power wet underfloor heating systems, for instance.
To find out more about the differences between gas and electric heating systems, take a look at our blog, The Ins And Outs Of Modern Electric Heating.