There are a few members who have used them as the basis of their home made incubator. It would be a fun project!
There are lots of kinds of lab incubators so would probably be useful to ask what kind of incubator it is. Looking around here in lab, we have one at 37C for bacterial cultures, one at 65C for RNA work, one at 37C with water pans for cell culture, a chicken egg incubator, and a shaker incubator at 38C for bacterial culture. Then there is one in the back nobody has touched in years that is labeled radioactive materials only. It's not on.