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Forsch · 02-13-2018, 10:26 AM

I used around 3 to 4 inches. It doesn't take much. The issue is making sure the opening in the ceiling is the size of the intake vents and the ducting is not collapsed. The small piece of PVC works well.

02-13-2018, 10:26 AM	#47
Forsch Established Member Join Date: Jun 2017 Location: San Bernardino Posts: 26 M.O.C. #20034	I used around 3 to 4 inches. It doesn't take much. The issue is making sure the opening in the ceiling is the size of the intake vents and the ducting is not collapsed. The small piece of PVC works well. __________________ 2017 Montana 3160RL Legacy (6th trailer) 2017 Ford F-350 Crew Cab 6.7L 4X4 Love the cold, dislike the heat (A/C is my friend)