[Chillin in ID]

I have a 2 story house with one thermostat upstairs, all of the intakes on the ceiling(s) upstairs, a slab foundation, and the registers that heat comes out of are all in the ceilings. This adds up to a freezing cold downstairs (where we spend most of our time) in the winter, and a toasty warm upstairs. I'm no expert, but I can't help but think that a ceiling fan in the stairwell (to push hot air down), and to somehow move a couple of intakes to the lowest points on a couple of the walls down stairs would actually allow the air in the house to circulate, and heat the lower level. It feels like there's a 20 degree difference between the two floors. Anyone have any ideas of how effective my idea(s) would be, and how much of a pain it'd be to put ducts in the walls somehow to pull cold air off the floor on the lower level? Thanks!

[hkstroud]

Close off all the supply vents upstairs and let the heat from the lower level heat rise to the upper level. A ceiling fan would help, if for no other reason, it would create some air movement.