I have no idea what temp DD's room is but at the moment (because it is so cold at night!) we have the ducted heating programmed to maintain about 15 degrees (I think) and it is STILL icey cold IMO! She wears PJ's, a sleeping bag (one from Harris Scarfe) and I usually pop a couple of bunny rugs over her as well. She sleeps no better or worse than during the day. If she gets too hot she wakes up crying.