While it is not an official requirement, it avoids any financial loss that a club might face in having to postpone any matches due to bad weather.
Under-soil heating technology is designed to address the challenges of adverse weather conditions, [7] specifically the accumulation of ice and snow on ground surfaces.
[8] When the system is activated, the heating unit circulates warm water or air through the pipes, effectively raising the soil temperature.
With American football, it is more a matter of player safety, since NFL games are never postponed on account of cold weather.
One notable incident happened on December 27, 2005, when three stadia in the FA Premier League, supposedly equipped with under-soil heating, failed to stop their pitches being covered in thick snow - this led to the matches being postponed.