HoneywellResideo Truezone 12" round damper with 24 volt position normally open actuator. TrueZONE Damper is a direct replacement for today's Honeywell legacy dampers, with easier installation and troubleshooting. Improved motor and gearing to insure long life and reliable operation . 2 position, 24 Vac power close, spring return forced air zoning damper. Adjustable range stops that are simple to use. Mechanical position indicator for damper blade. LED indicators show operation. Push-in terminals that are the same as the Honeywell TrueZONE panel. With R-8 insulation compatibility, the TrueZone damper is designed to pass energy efficiency audits.