DH is constantly turning the heating up saying he feels cold. Any more than 19 and I get too warm, but he would prefer 22, night and day. I only wear leggings and a t/shirt, he will wear a couple of layers and still complain. We use a summer duvet, we have it set at 20.5 as the compromise but neither of us are comfortable with that temp. What temp do you think is reasonable. It's a new build that retains heat very well.