So here is the deal with Trane Z-Wave thermostats. They really don’t work with Vera; we would like them to but Trane has given Schlage and Nexia an exclusive. Not surprising as they are owned by the same company. They will not share the documentation that we need to integrate them. At Vera were are device agnostic, we want to work with everyone and to be as compatible with as many devices as possible.
I would push back on the contractor who insists on using the Trane thermostat, if he is installing a Trane HVAC system, some of the Trane systems require their thermostats. Remember, you are the customer, it is your money.
You an also put pressure on them by writing and calling Trane and the Z-Wave Alliance. Z-Wave is by design an inter-compatible protocol and they are not living up to that. Complain or buy something else. Be vocal and vote with your wallet.