We arw well insulated in the main house but the kitchen and bathroom are in a single story extension and quite draughty.
This isn't a problem for me as I grew up in a post war prefab and you learned young to close doors or freeze to death!
Sadly the rest of my family were born in a barn and its driving me insane!
IF you close the doors, the heating only needs to be on for an hour or two a day. Leave them open and you're just heating the outdoors! WIBU to put those self closing devices on all of the main doors? It's driving me bonkers!