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

Product Description

The IO HVAC CONTROLS ZD-1808-BM is a modulating commercial zone damper with bottom-mount actuator configuration. It controls airflow within a zoned HVAC duct system by varying blade position in response to a modulating control signal, allowing precise zone-by-zone temperature management. Measuring 18 inches wide by 8 inches high with a 6-inch depth, and weighing 8 pounds, this damper is sized for commercial-grade duct installations where variable airflow control is required. It is installed by licensed HVAC technicians and sheet metal contractors working on commercial or light-commercial zoning systems.

This damper is intended for commercial zoned HVAC applications where modulating control is preferred over simple open/close operation. The bottom-mount design positions the actuator along the bottom face of the damper assembly, which suits duct runs where side or top actuator access is limited. Typical installations include multi-zone rooftop unit systems, commercial VAV-adjacent zoning setups, and large-footprint light-commercial buildings requiring individual zone airflow management. An HVAC controls technician or mechanical contractor handles installation and wiring to the zone control panel.

Key Features

• Modulating control allows variable blade positioning for precise airflow regulation rather than simple two-position operation
• Bottom-mount actuator placement suits duct configurations with restricted top or side clearance
• Commercial-grade construction sized for 18 x 8 inch duct openings
• Compact 6-inch depth minimizes required duct space for the assembly
• 8-pound unit weight supports standard duct hanger and support installations

Compatibility

Designed as an OEM-style modulating zone damper for commercial duct zoning systems requiring an 18 x 8 inch damper with bottom-mount actuator configuration.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor. Power down the air handling system and de-energize all control circuits at the panel before mounting the damper or making control wiring connections. Verify that duct framing and support hangers are adequate for the assembly weight and airflow loads before securing the unit. Control wiring must comply with applicable NEC low-voltage wiring requirements and the zone controller manufacturer specifications.