Took a training course on this today from work, thought I'd post up the link so people can play with them online and see how they work, as I was told you'll see these more on factory rooftop units in 2014 retails: $390 CDN for current replacement.

You can now go into the service part of the control and open or close your dampers and make sure your economizer is working correctly for P/M service lots of goodies