purbeast0
No Lifer
I remembered you posted some pics of your HT. I see an air return grate on the wall (presumably the furnace is on the other side) but only one vent on the ceiling. I think either there is another damper or a major break in the line supplying the vents(s) if you aren't getting much airflow since the furnace is right there.
Also, those windows while they look newish could be letting a lot of air through. I'd double check the caulking and possibly get some interior inserts which shouldn't cost much since they are pretty small.
Edit: upon further consideration I think they may have just run vents between the the joists off the the trunk line feeding the 1st floor. Might try closing up a few vents on the first floor (not ones located on exterior walls) to see if basement airflow improves.
there are 2 ceiling vents in my basement. one is the red one you have probably seen in the pics near the screen, and there is one like diagonal across the room from that one as well.
i have checked the windows and there isn't really any air coming in from that either.
i have also tried closing vents in rooms that would run "along the path" of the same vent goes to the basement, with no luck. just the fact that i feel such little heat coming out of the vents in the basement just seems weird. i definitely can feel heat coming out, but it's so faint it's almost irrelevant.