hi everyone I am servicing my Furnace on my 1978 Coleman Valley Forge. It has always served me well. When I took the furnace out of the assembly box, the Aluminum foil came off of the insulation that was in the box. The insulation IS still all intact, but the foil is missing (simliar to this picture - not mine). Question I have. Can you run this Furnace as is? Without the foil on top of the insulation? Can I put high heat tin tape over the insulation (good to 600f)? thanks in advance.