@Fred_W,
There has been a similar line of discussion on this under EVs. Up until now, Sense has focused on recognizing on and off signatures of devices which last maybe 1/2 second at the most, because those are the kind of devices Sense can recognize instantly. Things like kilns and EV chargers have signatures that are readily identifiable to humans, but only after they have run for anywhere from a few seconds to a few minutes, well beyond the narrow on/off time window for recognition that Sense had been surveilling. Sense have indicated that they are investing in learning much longer signatures, with the idea that these are not instantly identified (bubble appears as soon as device goes on and disappears immediately on off), but are rather accounted for after the fact.
Take a look at Brad’s post near the end of this thread: