What is the Comfort Index?

The comfort index is a unit of measure for how close your actual current temperatures are to the average desired temperatures in the building. 

Formula:

The absolute average of current - desired = comfort index.

We have a 3 zone system all with desired temperature of 70. 

Zone 1: 66

Zone 2: 73

Zone 3: 73

CI = |-4+3+3| / 3 =  3.3