The use of heat energy are as follows:
A radiator or heating system in a home provides radiant heat energy to warm a house during those long, cold winter months.
Conventional ovens are sources of convection heat energy, causing the food placed into it to become hot and cook.
Your body contains heat energy that can warm a cold glass of lemonade, melt the ice on the other side of a window, and make someone else warm when you hug them.
Geothermal energy is a type of heat energy generated and stored beneath the surface of the Earth. This type of energy is used to heat homes and buildings.
A huge amount of heat energy is stored in a bolt of lightning, which can strike and start a fire or cause an electrical outage.