Sealing an Unused Flue?

[Fivehorizons88]

I have a flue that leads to a basement fireplace that is not used and probably never will be used. Should I seal off the top of the flue completely to prevent drafts, etc? Right now it just has cap on it.

thanks!

 

[mellow]

You could do that if you are comfortable with heights.

If not you could just plug it from the bottom with a chimney balloon: (broken link removed to http://www.chimneyballoon.us/chimneyballoon.html)