I have a good customer wanting me to install one. So I have to read and understand everything before I start.Thank you for this. I've looked at dozens of pics, but was never able to find the pic you posted, so I guess I assumed it was just hard wired from a 120V line.
I've been sort of surprised that drainage hasn't come up on this thread (and am generally skeptical of so-called "smart" solutions). It may be too late in finished construction, but if I lived in a straw bale house, I'd want to feel good about drainage inside and out.