Ours is whatever the ambient temprature is.
Yasin gets shocking Croup and Imran gets it too but not so badly and the peadiatrician at the hospital advised us not to heat his room because it makes croup worse. If he's rugged up in his PJ's and under the doona but breathing cold air the cold air is better for him.
We co-sleep so if we're comfy and cozy then we know the bubbas are too.