Great question. That furnace base works with furnaces that are 24.5” wide. Most Goodman 80,000 btu furnaces are 21” wide, but some models are 24.5. Please check the width of the model you are purchasing to determine the width. If it is 21”, then please use Model FB2128. If you have any further questions or need further assistance, please feel free to reach out to one of our experienced customer service representatives and they would be happy to assist you. Thank you and have a wonderful day..
