Easier to have The 2 same fans, same orientation for cost savings from the factory, only 1 item to inventory, instead of 2, they all have that.
I hooked pipe to mine and tied them into my cold air return of my furance. But my furnace has no blower, just convection, so I need the blowers.Cold air return from existing run
I also did my own custom heat jacket , since I don't have a blower on the furnace, I added a small blower 500CFM just for the jacket with it own temp switch and piped it to both sides to wash the sides of the stove off, it runs indepently from the other blowers, as to keep the sides from getting too hot. Works for me.!Heat Jacket on LL Hyfire I