The traditional mini split ductless ones I have seen have a sensor in the air handler on the wall and that's it. I've got more than 9 of them and I have to tinker with the temp settings depending on time of day. My office for example which falls into the extreme category with no insulation (its an poorly enclosed porch
) ranges from 70 to 75 with the unit set at 77. Coolest part of the night will be around 75 and during the day it sits around 70.
Now bricked part of the house with good insulation I keep set around 74 and they range from 72 to 74 depending on the time of day.
The ones with sensors in the remotes and the roll around which has the sensor in the remote are pretty accurate within 2 to 4 degree variance from whatever you set them to no matter the time of day.