it would depend on the unit...some units use a special trane communicating t-stat. these units can be converted to a standard t-stat with the addition of a board. some units can use either one.
When she gets lonely and the longing gets too much
She sends a cable coming in from above
Don't need a phone at all
We got a thing that called radar love
We got a wave in the air...radar love....Golden Earring