Mine seems to stay very near the ground water temperature.
Seems like the water table is just a couple of feet under my slab.
I have noticed the basement is a bit more comfortable after the fans have been on.
The warm attic air takes a bit of the chill out of the air.
Maybe the attic air will take some of the sting out of running the A7.
But, when the sun is out, the PV usually makes any A7 run unnecessary.
The lack of insulation makes warming a very hard task..
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My hobby is installing & trying to repair mini-splits
EPA 608 Type 1 Technician Certification ~ 5 lbs or less..
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