Centrotherm Poly Chimney Cap Close to Wood Burning Cap

Centrotherm Poly Chimney Cap Close to Wood Burning Cap I have a centrotherm/innoflue flex line in my clay flue that used to have my oil boiler venting. I am replacing with a gas condensing boiler. As I went to finish it all up I realized that the poly cap is very close to the adjacent wood burning fireplace's chimney cap, about 10-11" space between, the two clay flues are about 20-22" center to center. Here is a pic of the two flues with the old oil boiler cap on the left one: Centrotherm do not seem to have any docs on acceptable distance of the cap to other things. If it is too close my other idea was to use some of the caps components like the locking ring and UV pipe and adapt that to a stainless steel block off plate with not cap on it. Anyone have any experience with this type of situation?