Roger I believe the Placebo works. [Linked Image]

Around here Johnson Controls handles most of the buildings we do.

The popular thermostat that is used has a slide control with no numbers just blue to red colors like the control on a car heater.

99% of the time all the way from "cold" to "hot" only results in 1 or 2 degrees of change.

The other 1% are in the VIP offices and the control will be programed with a larger temperature differential. [Linked Image]

Bob Badger
Construction & Maintenance Electrician
Massachusetts