I mostly got it to speed up steep times:
Steeping Times and an Ultrasonic Cleaner Part III
But yeah, it seems like it would be worth trying to speed up extraction times too. Plus, because the heater works independently, it will also be my tobacco "slow cooker", at least to check that method out.
Typod on my Celll Phlone using Tapatalk 2
It's That Good! Steep and Enjoy! 
And what is that fan thingy?