HeatMan,

Thanks for the feedback. Looks like it makes sense to do a larger
project than I had originally hoped.

Thanks for the input on the filter, I also use a humidifier in the
winter that I am not sure necessarily works all that well with this
type of system. I think it is an Aprilaire that is basically a piece
of foam that spins inside the horizontal duct. Any recomendations in
this area?

Thanks
Randy