3 degrees is indeed a lot, but you will only have the temperature sensor that regulates indoor temperature in a specific place so, depending on placement, other

3 degrees is indeed a lot, but you will only have the temperature sensor that regulates indoor temperature in a specific place so, depending on placement, other areas of the room can get way colder. Also they typically have builtin hysteresis so they only react when they go below a threshold of difference. Lastly most HVAC systems also manage humidity so heat sensation varies more.