A blower coil is a type of air handling unit that is used to move air through a duct system. It consists of a fan, a motor, and a coil. The fan is used to draw air into the unit, while the motor powers the fan. The coil is a heat exchanger that is used to transfer heat from the air to the air handler. The air is then moved through the duct system and into the living space.
A fan coil, on the other hand, is a type of air handler that uses a fan to move air through a duct system. It does not have a coil, but instead uses a heat exchanger to transfer heat from the air to the air handler. The air is then moved through the duct system and into the living space. The fan coil is typically used in larger systems, such as those found in commercial buildings.
Both blower coils and fan coils are used to move air through a duct system and into the living space. The main difference between the two is that the blower coil has a coil that is used to transfer heat from the air to the air handler, while the fan coil does not have a coil but instead uses a heat exchanger. The fan coil is typically used in larger systems, while the blower coil is more commonly used in residential applications.