I have searched almost all materia medica for the ailment you have raised in and found no specific remedies to the problem of your wife, and the symptom appears to be very strage and unique in pathology.
I would like you to visit a neuro and take his valuable opponion about it if it persists. In general, derangements due to lack of certain support of bio-chemistry in the brain cell makes sort of headache which may offset by taking a paracetamole minimal dosage.
Just try to focus airflow upwards the roof and leave cooling status alone in the room, and try wheather there is any improvement in her condition., or try to use split in stead of wall unit if this is the one fitted in the room.