MCruzan

I'm using the Davis weather plugin to track info on my weather station. I've set up a fresh air injection system for the house central air that would turn on (duct fan on plus electric damper opening) when the outside temp drops below the inside temp. Is there a way to get the outside temerature into a variable? Is there a way to compare variables to trigger a scene? Not seeing an obvious way to do this. What am I missing?