Originally Posted by
stant_98
Thanks for your reply George2.
Ok, here are some more details. I've got two gas furnaces. The first one located in the utility room in the basement (Rheem 75000 BTU/hr), and the second gas furnace is in the attic (also Rheem 50000 BTU/hr). The first furnace supplies air to the basement and the main level, the second one is dedicated to the upper level. Two thermostats - one on the main level and one upstairs.
Now as far as the air.. The air velocity is fine on the main level. The problem is that air velocity coming out of ceiling registers in the basement is low. I can feel the air and the warmth when I put my hand against the grills, but the air speed/velocity seems weak.
I can see the main supply duct. It comes up vertically from the furnace (above the heat exchanger) and goes up through the floor to the main level. That's that.
Now, this main duct also has a branch that splits off the main duct and goes horizontally along the ceiling parallel to the floor in the utility room and then it looks like it becomes invisible because at the point it becomes enclosed inside the drywall which is at the point where the utility room ends.