A fan plenum is a type of air distribution system used in HVAC systems. It is designed to evenly distribute air throughout a building, allowing for better temperature control and improved air quality. The fan plenum is typically installed in the ceiling of a building and is connected to a fan, which is used to move air through the plenum. The fan plenum works by drawing air from the building’s air supply, such as a furnace or air conditioner, and then distributing it throughout the building. The fan plenum also helps to reduce noise from the fan, as well as improve air circulation. Additionally, the fan plenum helps to regulate the temperature of the air being distributed, ensuring that the air is evenly distributed throughout the building. The fan plenum is an essential component of any HVAC system, as it helps to ensure that the air in the building is of the highest quality and is evenly distributed.