forced air furnace q's and construction update

[mustangt69]

i have a forced ar furnace out of a motorhome, and it has 3 outputs for venting. Those of you that have it, would it be worthwhile to run some 4" dryer hose along the wall and graduate it to pvc piping with two tee fittings( this would be attatched to the wall) and itulize this for a boot/glove dryer /heat vent??? Also we cut the fish holes 14x14, from evryones experience is that sufficient?

update on house construction::::

its been 2 weeks since we tore apart the camper. The frame/wheel system is done, floor is in place, walls are framed. We also have cut the holes. We gave it 6 holes 8x16 that should be sufficient. We also decided to make it a partial v front. The lower half of the front is flat and the top half is v'd. That way the tanks still fit on the original tank mounts for the camper. I am utilizing the booth/bunk setup in the back. The ceiling in most of the house will be flat ceiling and the back 5 feet will be vaulted or rounded to give more room for the top bunk