That's some great info.  I'll be running this on 120v lines, and even during the NYC winter, my steam heat (which I have no control over) is way too much for the room.  I can't crack windows when I'm not here. I'm on the 1st floor and it's a bit of a security thing. (No bars.)  

I certainly don't mind getting a lower hash rate to keep this working.  Thanks again for pointing me in that direction.  Great info!