The question is this: Someone pointed out to me that I really should be using 2¬Ω" x 14" baseboard vents rather than floor vents. I agree in the sense that floor vents tend to catch a lot of dirt over the years, but I was wondering about the issue of sending the air up versus out into the room. Maybe it's not really an issue.
Summers are in the 80's but rarely hit 90. Winters are long and cold. Usually in the 20's. The wall of 12x12 windows on the side of the addition where the vents will be, faces the sun, meaning that we will get some (good) heat value from a sunny day in the winter, but the potential for a cold room as we don't get much sun in the winter. As for the summer, the AC would be cooling the room.
We have a 52" ceiling fan as well.
So. Vents, straight up .vs vents mounted on the baseboard that blow straight out....