A number of National Football League (NFL) franchises employ field heating systems to mitigate the impact of cold weather on the playing surface. These systems, typically utilizing a network of underground pipes circulating a heated fluid, prevent the ground from freezing, ensuring a playable field. Examples include teams in colder climates, such as the Green Bay Packers and the Chicago Bears, though the exact list can vary as teams upgrade their facilities.
The importance of these systems lies in player safety and game integrity. A frozen or icy field presents a significant risk of injury to athletes. Furthermore, it can negatively affect the game itself, impacting traction, ball bounce, and overall playability. Historically, field heating technology represents a considerable advancement in ensuring consistent playing conditions throughout the NFL season, particularly in regions experiencing harsh winters.