Close doors between heated and unheated spaces

Close doors between heated and unheated spaces

It’s obvious why this makes sense. The hard part is understanding why the doors are open!  If users just forget to close the door, a cheap hydraulic door closer might help.  If groups feel it must be open to welcome people, you might be able to install a glass panel so newcomers can see what is happening inside the space.  If users struggle to enter the space unaided, then you will need either a more expensive automatic door or to station someone at the door to help.