Nice looking job Dennis. I especially like them high enough that they'd have not risk of the heat from LP coming up out of the flue. (When I had talked over the install by the tech doing my Amish Cooling Unit, we had agreed to a location that was up about 8 higher, and offset to the side of directly over the flue. This would have done what I wanted. Draw air up/over/thru the air coil, and push it towards the top. It was to accompany the stock fans when they kicked in, and the lower fan when it is turned on...
You did a clean job on yours!!
Best to all,
Smitty