Which thermostat to wire humidifier to?

Old 09-17-19, 10:16 AM
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Which thermostat to wire humidifier to?

I have an Aprilaire 600 humidifier currently wired to a manual humidistat and wanted to wire it up to one of our Ecobee thermostats for easier/automatic control.
We have two zones in our HVAC system, upstairs and downstairs. Which thermostat would be best to wire to, upstairs or downstairs?

Old 09-19-19, 10:23 AM
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The primary zone which is typically the first floor.

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