Brief Description: Oil Heater 21 Duct heat to shut off box
I used Garolite G10 for a base on my duct. There was a fair bit of under the seat fitting before I arrived at this shape. Meanwhile the RV box had been heavily modified and I think I can make this all work.
Pic 2 has the garolite G10 floxed in position and after cure a wide cut out. I also added some micro internally to transition the edges with the idea that this would help air flow.
Pic 3 is the modified box in place, which will get screwed into position. I need it removable for maintenance, or rather just in case it needs maintenance one day.