Ecobee 4 powering a drum humidifier?

[rhconcepts]

I upgraded to the ecobee 4 and it has a 24v output for a humidifier. Does anyone know the limitations of that output? I need to know if that wire will be ok with powering a skuttle 86-UD under duct drum humidifier. It was enough to trip a relay on the other humidifier but will it be enough to power the drum motor?

[scarey8]

Unsure what the contact ratings are for tolerances with the Ecobee, by why not air on the side of caution and use a relay to isolate the humidifier from the thermostat.  Thermostat wired to relay coil, humidifier wired to relay contacts.