"Dr. deb" wrote in message ...
golf wrote:

Hi group:
What success have you people had using the normal household furnace
ducting for a mainline. I know I would have to duct-tape the joint on
the whole length??????????????

Jow

-- Remove par from email address for replying

You can also use 4" schedule 40 PVC.

Deb

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I use metal, too. The only problem I see with the PVC is that you
still have to ground it, whereas the metal acts as a ground.

"Just one OLD man's opinion."

The Other Bruce