That’s interesting. In the Ball Blue Book, they recommend not trying to hot water bath can with steam, but my books are pretty old.
It looks like someone developed the technology to do it after all.
I’ve been canning for thirty years with boiling water bath canners and pressure cookers. I’m probably one of the few Americans that live in the south without AC and I usually drag my boiling water bath canner outside on the patio and can with my outside stove to avoid heating up the house. I’m now babysitting my grandchildren and it’s not convenient to do so. I thought it was worth a try and I have been extremely happy with it. It has two 1/4 diameter holes, one on each side and when the steam comes out in a column about eight inches long you time it just like a boiling water bath.