Brian,
You are right, CH makes several panels that will accept twins in every space. Make sure if you do, you're using the CHT style and not the CHNT breakers in a panel not designed to accept them.
Wonder why I didn't ask how many circuits he needed to add?? And suggested a twin or two. [img]/forums/images/icons/confused.gif[/img] [img]/forums/images/icons/grin.gif[/img]