The upstairs simply will not cool.

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Ac wasn't as good as open windows, both with two fans going to boot.  That was a single ac, of either type.  Technically, the temperature was pretty much the same, with ac as with open windows, but the open windows felt much cooler.  The temperature did not drop all night, once it got down to 78.

As I remember it, there was another thing I did up there.  A large vent in the floor allowed air transfer.  But... how to work that best?  Last year I closed it off, when trying to cool the upstairs.  Or the year, or some various general 'year', before.  It seemed successful.

So, this morning, I went looking for the packing I had put in there last year, and found it.  I removed it in the winter, to, perhaps, get some heat up there.  I think it partly worked.  How flow really works in the house is a whole different thing.  Without the overhanging branch, it is rather rough.

If I had the money, I would put a flow baffle fan vent on the side of the roof, and make sure the vents in the gables (is it) are clear, open, and working.  That might help some, as well.  More money would be spent on whole house ac.  It is impossibly hot in here, or has been to date.  This is a problem.

Outside, at the moment, is 50.  Upstairs is 78, the main is 71, and this front room is 66.  It is just about 07:00.  Will see what is possible in maintaining the cool, now with the upstairs shut off.  Not a lot of hope.  But at least, in spite of the heat up there, I am not heatsick this morning.

As soon as I can more fully wake, out to chores.  I am looking forward to seeing the next batches of chicks.  Two batches at some point in hatching.  Later.