The definition of a coil heat is a type of heating system that uses a series of metal coils to transfer heat from one place to another. This type of heating system is commonly used in homes and businesses as an efficient and cost-effective way to heat a space. The coils are typically made of copper or aluminum and are heated by electricity, gas, or oil. The heat is then transferred to the air or water in the space, providing a comfortable and consistent temperature. Coil heat systems are also known for their low maintenance and long life, making them a popular choice for many homeowners and businesses. Additionally, they are highly efficient, as the coils can be adjusted to the desired temperature, allowing for a more precise control of the temperature in the space.