Hi Tara, I have a Skutt 1027 with 3" brick - I just started a bisque fire and my controller said a little over 14 hours. I know that seems long, but I use a lot of speckled clays so I always slow fire. This is a straight up 04 bisque, no preheat and no hold. Add another hour for a glaze fire, a little longer if I'm doing a hold. By the time the kiln is cool enough to open it's been 2 days - talk about torture!!