Here are some temperature results and total darkframes at each temperature.
Ambient: 20.6C (69.1F)
Camera closed up running for 1/2 hour, no cooling (just heating of box by camera: 39C (103F)
Cooled 2 minutes: 23C (73.6F)
Cooled 4 minutes: 18.6C (65.6F)
Cooled 8 minutes: 14.6C (58.3F)
Sorry, forgot to capture frame!
Cooled 16 minutes: 11.7C (53F)
Cooled 32 minutes: IRIS shows the Median=3 and Mean=4.52 counts out of 734!