I have a finished basement, furnished and live in the Midwest. I do not use the are very rarely in the winter. I would like to know how much it would decrease my heating bill. I could close it off with a temporary closure. I have all the heat ducts closed. Is it worth the effort to close it off. Would it save much on the heat bill. I realize that heat rises but curious if having the entry way open to the basement uses much more heat. Is it advisable to close vents in other rooms that are not used. The rooms all have cold air returns in the as well as the basement. :confused: Some ssy not don't close them off, others say yes why heat unused space. :confused:

The only problem with closing vents is that you can cause the furnace to overheat. The furnace creates so many BTU of heat value and when you close the vents you are blocking the furnace from blowing the heat out causing the furnace to run to hot which in turn will cause other problems.

You might be able to close a few but you really need a on site HVAC professional to do a temperature rise test to see what effect it is having on the furnace.

Here is the answer for your basement also.

The only problem with closing vents is that you can cause the furnace to overheat. The furnace creates so many BTU of heat value and when you close the vents you are blocking the furnace from blowing the heat out causing the furnace to run to hot which in turn will cause other problems.

You might be able to close a few but you really need a on site HVAC professional to do a temperature rise test to see what effect it is having on the furnace.