Looking for a smart thermostat that does not require a C wire (2021)

[RBoy (www.rboyapps.com - Making SmartThings Easy!)]

There are many battery operated thermostats, including Honeywell, GoControl, Linear etc - the batteries last about 3-6 months depending on usage.

Alternatively you can use the Venstar add-a-wire system shown here to convert an existing wire into a C-Wire, we have it here in the lab and it works great:

[RELEASE] Enhanced Z-Wave Plus Thermostat Device Handler - Honeywell, GoControl, CT, Linear, Trane, MCO, Remotec

Nicely summarized, this was the post you were referring to above. These thermostats shine when on C-Wire. Alkaline batteries on the other hand tend to last about 2-4 months depending on usage and the mesh quality and should be within 30-50ft of another z-wave repeater device. There is an option battery save mode in DTH preferences page which reduces polling requests from the platform to save battery. Using 1.5v lithium batteries can double/triple that lifespan but you need to watch the battery dead reporting threshold which will be higher than that for Alkaline batteries. You can also check out the [RELEASE] Configurable Low Battery Warning/Notification/Monitor and Device Monitoring Alerts app which is tuned for creating configurable low battery rules. For folks who don’t have a c-wire op…