Hydronic heating coils are a type of heating system that utilizes hot water or steam to heat a building. The coils are usually made of copper, stainless steel, or aluminum and are connected to a boiler, furnace, or heat pump. The water or steam is heated to a certain temperature and then circulated through the coils, which transfer the heat to the air in the building. This type of heating system is often used in commercial buildings, as it is efficient and cost-effective. It is also beneficial for those who suffer from allergies, as the air is not dried out by the heating process. Hydronic heating coils are also great for heating large areas, as they can be installed in multiple locations throughout the building. Additionally, they are relatively easy to maintain and repair, making them a great choice for many commercial buildings.