Moving washer and dryer in basement remodel?

We are thinking about moving the washer and dryer in our basement to a more logical spot. This would mean running our pex piping = not a big deal. My concern is more for the dryer - how long can the dryer vent hose be? Ours would likely need to be about 16 feet long to go up the ceiling and back out to the hole that's already there venting outside.
Thanks, George. That's what I figured. Much appreciated.

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