Fresh air ventilation control panel, 9″ round 2-position damper, 120/24 20VA transformer, includes ODT & Humidistat. The iO-FAV-PLUS fresh air ventilation system is designed to introduce fresh air into a building through an intake damper controlled by a micro-processor logic panel. The iO-FAV-PLUS has single adjustment setup, exhaust fan control option, and outdoor temperature and humidity limit options included in the kit. It is easy-to-install and meets ASHRAE 62.2 standard. The iO-FAV comes with a panel, 20VA transformer, outdoor temperature sensor, humidity sensor, and round damper. The control panel is available separately (iO-FAVPAN) and can be ordered with additional size dampers both round and/or rectangular.