What is the normal Supply Air volume for a Forced Air Furnace in CFM?

The normal supply air volume for a forced air furnace can typically range between 400 to 900 CFM (cubic feet per minute) for residential applications, depending on various factors such as the size of the home and the capacity of the furnace. The selection of 700 CFM as the chosen answer reflects a common standard that aligns with the middle of this range, making it a practical and often used value in many residential heating scenarios.

This volume ensures that the furnace effectively circulates heated air throughout the space, allowing for proper temperature control and comfort. It's important to consider that the actual supply air volume may vary based on specific installation configurations and the heat load requirements of the dwelling, but 700 CFM is a widely accepted benchmark that reflects a good balance of efficiency and effectiveness for typical forced air systems in homes.