Gas and Oil Home Heating Furnaces - no heating duct required???

I have an old 1 1/2 storey war house that I'm gutting sort of in quadrants you know, a bit at a time. I'm single so i dont mind the mess and can't afford to do it all right now.It can all be meshed together like a jigsaw puzzle later.I've finished replacing all of the old cast iron drains right back to the city so its all new. even roughed a 2pc bathroom upstairs while I was at it. Even replacing old wiring as I go. The first floor is 24' x 24' (has 1 ft crawl space under then dirt).I will be replacing and insulating the floors with chicken wire and ROXUL R-22.It is pretty much open except for a few partitions. There is a bearing wall about 8' long that runs perpendicular to the ceiling joists and in the center of the house.I'm wondering can I channel the heat through 2 ceiling joists for about 14 feet. The guy before me had framed in the 10" by 20" ducting in the hallway which is next to the stairs.You were almost scraping your head on his ceiling.(I ripped it all out) Now there is a opening from the furnace at the end of the hallway about 7ft up). The furnace is in a 12ft X 12ft addition/laundry/water heater room at end of hallway that I have already finished with 2 x 6 wall and rafters etc.Its pretty snug in there so I cant even go under the floors joists with heating ducts. I want to simply channel the heat right into the joists so all I will have is a little angle on the far wall of the hallway and a 8ft high ceiling the rest of it. Once the heat travels along the joists into the center of the house over that bearing wall, I plan to bring it down to the floor with ducting and have 3 or 4 registers pointing wherever i decide .Also I can "tee" into it and go upstairs as well.What do YOU think??? Any suggestions would be appreciated.

I've run heat through joists before, but I'd check local building codes before I did it. Some places might not like that heat in wooden joists. Maybe they would just let you sheath it in metal. You might also run into problems if you add AC, the cold air might cause condensation, quickly followed by mold.