Io Hvac Controls TD-1808-BM Zone Damper 18x8 Bottom Mount

Product Description

The IO HVAC CONTROLS TD-1808-BM is a rectangular zone damper designed for use in zoned HVAC duct systems where precise airflow control is required. Sized at 18 inches by 8 inches, it ships with a Belimo 3-wire actuator mounted at the bottom of the unit. The actuator operates on a 60-second stroke cycle, providing reliable, repeatable blade positioning for zone-by-zone temperature management. This assembly is built to match the dimensional and electrical requirements of Trane and American Standard zoning systems, making it a direct-fit replacement for service technicians performing zone system repairs or upgrades.

This damper is intended for residential and light commercial forced-air zoning applications. It installs into rectangular ductwork as part of a multi-zone control system, typically managed by a zone control board that sequences damper positions based on thermostat demand. The bottom-mount actuator orientation is suited for installations where access from below the duct is preferred. Technicians replacing failed zone dampers in Trane or American Standard zoning systems will find this assembly dimensionally compatible with existing duct openings sized for an 18-inch by 8-inch damper.

Key Features

• 18 inch by 8 inch rectangular damper sized for standard duct openings
• Belimo 3-wire actuator included for direct zone controller wiring
• 60-second actuator stroke cycle for controlled airflow modulation
• Bottom-mount actuator orientation for accessible installation scenarios
• Built to match Trane and American Standard rectangular zone damper specifications

Compatibility

Designed as an OEM-style replacement zone damper for Trane and American Standard rectangular duct zoning systems requiring an 18 inch by 8 inch damper with a bottom-mount Belimo 3-wire actuator.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with zoned forced-air systems. Shut down the air handler and de-energize the zone control board before disconnecting or reconnecting actuator wiring. Verify actuator wiring polarity and signal type match the zone controller output before powering up the system. Confirm duct dimensions and actuator mounting clearance before securing the damper in place.