I've searched the forum and it looks like I do not have insulated boots and when i went up to the attic today, i noticed the boot was cold to the touch and had a small draft coming from where the boot meets the Sheetrock of the ceiling.
I was thinking of using great stuff and sealing around the boot. I will use a combination of doors and windows great stuff and the normal expanding great stuff.
I also noticed a small hole in the diffuser box (I think that is what it is) and I will use great stuff to seal that. There is also a small amount of mold on some of the tape.
Bottom line, is it worth the cost for 20+ boots to seal with great stuff. I have blown fiberglass insulation and I live in Southern Alabama and will probably only live in this house for another 2-4 years