Draft Inducer

A draft inducer is a component found in many heating systems, particularly in high-efficiency furnaces. Its primary function is to assist in the proper venting of combustion gases from the furnace to the outside atmosphere. Here’s how it works and why it’s important:

  1. Combustion Process: In a furnace, the combustion process generates hot gases as a byproduct. These gases contain combustion byproducts, including carbon monoxide and other potentially harmful substances.
  2. Venting: It’s crucial to safely vent these combustion gases outside to prevent them from accumulating inside the living space, which could pose serious health risks. Proper venting also ensures efficient combustion.
  3. Draft Inducer Function: The draft inducer is a small fan or blower located near the furnace’s exhaust vent. When the furnace is turned on, the draft inducer starts before the main burner ignites. Its purpose is to create a draft or negative pressure within the combustion chamber and venting system.
  4. Ensuring Proper Venting: By creating a negative pressure, the draft inducer helps ensure that combustion gases are properly vented through the flue or exhaust pipe. This is especially important in high-efficiency furnaces, where the combustion process is more tightly controlled, and the venting system may operate under negative pressure.
  5. Energy Efficiency: In addition to safety considerations, the draft inducer also contributes to the overall energy efficiency of the furnace. By maintaining a consistent and controlled draft, it helps optimize the combustion process and ensures that the furnace operates at its designed efficiency level.

In summary, a draft inducer is a critical component in modern heating systems, particularly in high-efficiency furnaces, helping to create a controlled draft for safe and efficient venting of combustion gases. It plays a key role in maintaining a safe indoor environment while maximizing the performance of the heating system.