Yes. Although only one fan can be connected directly to your ecobee thermostat, all fans assigned to the connected fan’s Room in the Haiku Home app will operate simultaneously.
For example, if you have two fans assigned to “Living Room” in the Haiku Home app, connecting either of those fans to your ecobee will result in both of them being controlled by the thermostat.
To adjust your Room settings, tap in the Haiku Home app, select Rooms and Devices, and then Edit to assign your fans to the desired Rooms.
Complete the form below and we will contact you shortly.