The following table summarises the terminals of the HVAC Controller along with their common variants:
| Label(s) | Description | Common Variants |
| L | Terminal for the live wire to power the controller | |
| N | Terminal for the neutral wire connection | |
| RC | Power wire from the cooling equipment | R |
| RH | Power wire from the heating equipment | R |
| Common | Allows the continuous flow of power that the thermostat requires to operate | C |
| W1 | Controls your heating system | W |
| W2 | Controls the second stage of your heating system | W |
| Y1 | Controls your compressor | Y |
| Y2 | Controls the second stage of your compressor | Y |
| GL, GM, GH | Controls the multi-speed fan, where GL is low speed, GM is medium speed, and GH is high speed. | G1, G2, G3 |
| O/B | Utilised for heat pump systems to tell the compressor to switch between heating and cooling. |