Ecovent works with all standard forced air (central) systems. Ecovent is not a solution to regulate:
radiant heat
ductless systems
high-velocity systems
or window units,
but if you have these in addition to central air, Ecovent will still work to regulate your airflow when your central air system is running.
Ecovent's compatibility depends on the size of your vents and having a compatible thermostat.