Found the installation guide, and have attached the pages regarding the venting.

One pipe install is acceptable.

Attached Images

Nordyne_G6RC_080C-12B_Furnace_venting.pdf (650.6 KB, 27 views)

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Shane in KC "Deal Killer"? Nope...just an ASP (assisted suicide provider)!
Current favorite quote: "Character is doing the right thing when nobody is looking."