Io Hvac Controls ZD-1812-BM Zone Damper 18x12 Bottom Mount

Product Description

The IO HVAC CONTROLS ZD-1812-BM is a modulating commercial zone damper designed for precise airflow control in multi-zone HVAC systems. Measuring 18 inches wide by 12 inches tall with a depth of 6 inches, this bottom-mount damper regulates conditioned air distribution across independently controlled zones. The modulating design allows continuous blade positioning across a range of positions rather than simple open/closed operation, enabling accurate zone-by-zone temperature management. It is installed by licensed HVAC technicians in light commercial and commercial ducted forced-air systems where zoning control is required.

This damper is suited for commercial zoning applications where ductwork demands a bottom-mount configuration. The 18-inch by 12-inch face size accommodates standard commercial rectangular duct dimensions. Typical installations include variable air volume (VAV) style zoning, multi-zone rooftop unit systems, and ducted split systems requiring proportional airflow control. The bottom-mount actuator placement makes it appropriate for horizontal duct runs where top or side access is restricted. HVAC contractors working with zone control panels and low-voltage actuator wiring are the primary installers of this damper.

Key Features

• Modulating operation allows proportional blade positioning for precise airflow control
• Bottom-mount actuator configuration suits horizontal duct installations with restricted top access
• 18 x 12 inch face size fits standard commercial rectangular duct openings
• 6-inch depth accommodates typical commercial duct inline installation clearances
• Designed for commercial HVAC zoning systems requiring multi-zone air distribution management

Compatibility

Designed as an OEM-style replacement or new-installation component for commercial rectangular duct zoning systems requiring modulating damper control in 18-inch by 12-inch duct openings.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with commercial zoning systems and low-voltage control wiring. Shut down the air handling unit and de-energize all associated control circuits before beginning installation. Verify duct dimensions and actuator wiring connections against the zone controller specifications prior to final mounting. Follow applicable mechanical codes including SMACNA duct standards and local building codes for commercial HVAC installations.