Trigger Ecobee + Dehumidifier with external humidity sensors?

[calinatl]

Your best bet is a separate dehumidistat if the dehumidifier is not otherwise tied in to your HVAC.

Also, since this is a major appliance in your house, you want it to work even if you no longer use the Hubitat. However you may also wish to concurrently be able to control it via Hubitat.

Some very helpful Hubitaters helped me figure out how to wire a Zen 16 relay in parallel with the dehumidistat so now if the Hubitat goes down the dehumidistat will control the dehumidifier.

Automating a manual Humidistat with this relay? thoughts

Just reading this thread and thinking. I would be inclined to put the current manual/mechanical humistat in series with the Z-Wave controlled relay. Then set the mechanical to a %age that is just above what you would ever want. This way if the Z-Wave goes off the reservation, the mechanical thermostat will stop the humidity from going really high.