ducting to server room as well?
Nah no point, it would be getting heat for most of the year, and I'd have to add a return in the hot aisle too. Server room will just use crawlspace air to cool, which will be cool in winter by default, or cooled by the A/C.
Though, a direct duct with a damper has come to mind, could have the damper open when the temp in there is past a certain threshold.
And it's all done, and running:
And while I was on nights figured I'd improve my mobile interface, it's not really pretty but it's functional:
