Then of course you will need all the little bits to make it work right. Ducting tubes that go through the sheet metal, hose to connect tubes to fan, then little flapper pieces at the output of the fan. (work as check valves).
the fan is energized by pulling up all the way on the heater handle. This enables a ground connection for the blower motor. Should see a wire connection if you pull the handle assembly out. Power is wired through the relay board.
Oh yea ENJOY.
Hey we need an Electrical Trouble shooting Smilie. Like scratching his head with puzzled look on his face.