Fav panel w/relay, transformer, junction box and wiring under single cover with integrated relay. Includes 6″ Powered Open, 2 wire damper. The Fresh Air Ventilation system is designed to introduce fresh air into a home through an intake damper controlled by a micro-processor logic panel. The iO-FAVR-ENHANCED has single adjustment setup, exhaust fan control option, outdoor temperature and/or humidity limit options and damper override capabilities. The control board, transformer, junction box, and integrated wiring are all including under a single cover to meet code requirements in certain areas of the country. The integrated relay gives you a 24V or 120V damper option. It is easy to install and meets ASHRAE Standard 62.2. Kit comes with preassembled control panel wired with 20VA transformer, relay to energize an exhaust fan, gang box for line voltage separation and 6” damper.