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The IO HVAC CONTROLS RM-1808 is a rectangular zone damper designed for forced-air zoning systems in residential and light commercial HVAC applications. It ships with a 35-second Belimo actuator wired in a 3-wire configuration, allowing for proportional or on/off control depending on the zoning panel in use. The damper body measures 18 inches by 8 inches and is built to regulate airflow through a specific zone, directing conditioned air where it is needed while restricting flow to unoccupied areas. Licensed HVAC technicians install this damper as part of a multi-zone duct system.
This damper is suited for rectangular duct installations in split-system forced-air setups where zone control is required. The 3-wire Belimo actuator connects to a compatible zone control panel and provides reliable, repeatable blade positioning. Typical installations include residential multi-zone systems where individual room or area temperature control is the goal. The 18-inch by 8-inch face size fits standard rectangular duct sections of that dimension.
Designed as an OEM-style replacement or new-installation zone damper for rectangular duct zoning systems requiring an 18 x 8 inch damper with a 3-wire Belimo actuator.
Installation should be performed by a licensed HVAC technician. Shut down the air handler and disconnect power to the zoning control panel before wiring the actuator. Secure the damper body into the duct section according to the manufacturer instructions and ensure the actuator shaft is properly engaged before connecting control wiring. Follow applicable mechanical and electrical codes during installation.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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