If thermostat is set to cool (or heat) before 6pm, you might be able to use smartlighting to turn it off at 6pm if the thermostat supports the capability “switch.” Smart lighting is intended to work with light/fan/appliance switches and bulbs, but there are several kinds of device handlers that can use that capability to work with smart lighting.
If the switch capability really does work, maybe the power allowance does too.
I’ve responded to you in the Flair devices thread. With My Ecobee device, you can use the ecobeeSetZoneWithSchedule smartapp which can orchestrate your main thermostat’s cooling/heating setpoints (ecobee) with all your window/split/portable heaters/coolers in your rooms using the Flair HVAC unit DTH for more comfort & energy savings in your home.
You can then configure your rooms/zones/schedules and the smartapp will take care of the rest with its built-in logic.
The smartapp can adjust your unit’s fan speed based on the temp differential in the zoned rooms (based on your ST connected temp sensors)
The smartapp can turn automatically on/off your unit based on your scheduled zones during the day.
You can even specify a temp delta for each zone to make some rooms cooler or hotter depending on your requirements.
These are the most advanced zoned heating/cooling smartapps under ST.
Here’s an explanation on the use of custom code in ST, which describes device handlers.
If the code for a device handler includes the capability “switch,” then it should be possible to use it in smart lighting.
Smart lighting works with switches, but some other devices can look like switches as far as smartlighting is concerned if the device handler code is written appropriately. For example I have a z-wave doorbell, but since it has the switch capability in the device handler code, every time the doorbell button is pushed, the “switch” turns on and then off, like a momentary switch.
I don’t actually know anything about programming languages, so I can’t actually explain how the code is written.
As I wrote to you earlier, with the Flair puck (IR Setup) and My HVAC unit DTH, you can control not only your unit based on the switch capability, but also as a thermostat (to manage its setpoints, unit mode and fan mode). My DTH implements both switch and thermostat capabilities for more flexibility.
You see see the list of capabilities and commands here