The cycles are about the same length and it's probably the same as the medium heat setting on the dryer I have. 

I haven't figured out a way to measure how much power the dryer was using on each cycle. It seemed like the heating element would turn on and off while the dryer was running. I don't have a meter that can record the total power usage for the cycle, so maybe I could stand at my clamp meter for 40min taking notes while its running to get a rough idea. My best guess is that the miner is pretty much on par with the power usage of the dryer. 

There hasn't been a huge spike in the overall monthly power usage since I started using it and it was running a few hours a day in the summer time at least. If the miner was using more or less power than the dryer I didn't notice it in the power bill.  

 Thought this might be a good resource for you @rev.hodl This guy did a similar modification to his dryer except pulling from attic air not from the exhaust of a miner. He uses a “TED” to observe the power differential from the two ways. Just thought I would pass it along in case it was helpful.

https://www.johnsavesenergy.com/attic-air-clothes-dryer

https://www.johnsavesenergy.com/ted-the-energy-detective 

 That's great, thanks for the response.  I didn't really factor in the cycling that would happen on the element, you may even have more consistent overall heat on the miner once it's spooled up. Cheers