If you're at home for the day and it's cold, do you have the heating on all day or just periodically? When I woke up this morning the house was freezing, I was so cold so so I put it on but now it's warmed up and I feel a bit hot so I've switched it off and switch it back on later but that's probably more expensive isn't it? I've got joggers and a t shirt and a jumper on.