Ewc Controls END-20X8 Motorized Damper 20x8 Inches

Product Description

The EWC CONTROLS END-20X8 is a rectangular motorized zone damper designed for residential and light-commercial HVAC zoning systems. Operating at 24 volts, this ND series damper controls airflow through duct systems as part of a multi-zone comfort setup. The unit features a side-mounted motor with nylon bushings for quieter operation and an LED indicator light that lets technicians visually confirm damper position during commissioning. The reinforced frame is engineered for faster duct installation without sacrificing durability. Three wires connect to the motor for straightforward field wiring integration with a zone control board.

This damper is sized at 20 inches by 8 inches and fits rectangular duct openings of that nominal dimension. It is intended for air quality and zoning applications in forced-air systems where multiple zones require independent airflow control. The ND series is built for installers who need a reliable, field-serviceable damper that reduces troubleshooting time through its onboard LED diagnostic feature. Typical applications include residential zone systems with two or more zones managed by a compatible zone control panel.

Key Features

• LED indicator light confirms open and closed damper position during installation and checkout
• Nylon bushings on motor shaft reduce operational noise and extend motor service life
• Heavy-duty rectangular frame designed for faster, more secure duct insertion
• Side-mounted motor keeps the damper profile compact within the duct system
• 3-wire motor connection integrates with standard 24-volt zone control boards
• 24-volt operation compatible with low-voltage HVAC control circuits

Compatibility

Designed as an OEM-style replacement or new-installation motorized damper for rectangular duct zoning applications in residential and light-commercial forced-air HVAC systems.

Installation Notes

Installation of motorized zone dampers should be performed by a licensed HVAC technician familiar with low-voltage control wiring and duct fabrication. Shut down the air handler and de-energize the zone control panel at the transformer before making any wiring connections. Verify duct opening dimensions match the damper nominal size before securing the frame. Follow the zone control board manufacturer wiring diagram for proper terminal assignments on the 3-wire motor lead.

Technical Specifications

• Product Type: ND Motorized Damper
• Size: 20 inches x 8 inches
• Shape: Rectangle
• Voltage: 24 volts
• Wires to Motor: 3
• Motor Mount: Side
• Features: LED indicator light
• Application: Air Quality Zone Control

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: END-20X8