Io Hvac Controls RM-1808-BM Zone Damper 18x8 Belimo 3-wire

Product Description

The IO HVAC CONTROLS RM-1808-BM is an 18 x 8 inch rectangular zone damper with a bottom-mount configuration and a 3-wire Belimo actuator. It controls airflow in a specific zone of a ducted HVAC system by opening or closing on command from a zone control board or thermostat. The actuator cycles in 35 seconds, providing smooth, reliable blade movement without abrupt pressure changes in the duct. Licensed HVAC technicians install this damper as part of a multi-zone residential or light commercial zoning system.

This damper is sized for 18 x 8 inch rectangular duct runs and is designed for bottom-mount actuator placement, making it suitable for installations where access from below the duct is preferred. It works within ducted forced-air systems using zone control panels that support 3-wire, spring-return or non-spring-return actuator wiring. The bottom-mount design helps in tight plenum or attic installations where side clearance is limited.

Key Features

• 18 x 8 inch rectangular duct size for direct inline installation
• Bottom-mount actuator position for installations with limited side clearance
• Belimo actuator with 35-second cycle time for smooth, controlled blade travel
• 3-wire actuator wiring compatible with standard zone control boards
• Packaged dimensions of 14 inches wide, 22 inches tall, and 8 inches deep

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for 18 x 8 inch rectangular ducted forced-air zoning systems that use 3-wire Belimo-style actuators.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with zoned forced-air systems. Disconnect power to the air handler and zone control panel before wiring the actuator. Verify that the zone control board supports the actuator wiring configuration before energizing. Follow local mechanical and electrical codes when securing the damper body to the duct and routing low-voltage wiring.