Answer
Aug 02, 2025 - 04:06 AM
From the data that we were able to obtain (you will want to confirm this), the Grand Design Reflection fifth wheel typically requires a 4¾″–5″ cut-out and around 1.5″ collar depth in the duct to reach the HVAC collar.
So the cut-out size matches perfectly.
But the collar depth of the coolvent is only ¼″, much too shallow to reach standard ducting depth. So if your Reflection vent openings are deeper than the 1/4", you would need to modify or add a metal collar to this vent to make it work.
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