(This comment if for those with all zones on one Flex Daily schedule.)
My implementation at 45 degrees F has worked exceptionally well. There have only been two period of warm weather here in the Dallas area in the past 2 months. One started about 5 weeks ago, lasted about 3 weeks, and normal Flex Daily watering was done. And then about a week ago, lasted about one week, and again normal Flex Daily watering was done. That’s it. The rest of the time the Iro2 has been automatically prevented from running.
See http://welserver.com/perl/plot/WEL0343/Sprinkler1.png .
I have some h/w skills so my 45 degree F implementation is ‘home brew,’ especially for Flex Daily only users where currently Iro2 implementation is fixed at 32 degrees F. Hopefully one of the coming V3 enhancements will be to allow Flex Daily users to adjust this parameter.