Ewc Controls END-8X12-MA15S Motorized Zone Damper 8x12

Product Description

The EWC CONTROLS END-8X12-MA15S is a motorized zone damper engineered for residential and light-commercial HVAC zoning applications. Sized at 8 inches by 12 inches, it fits standard rectangular ductwork and is designed for fast, straightforward installation. The damper operates on a power-open/power-closed, 3-wire configuration driven by a motor producing 17 inch-pounds of torque, with a built-in manual gear release for service access. Overlapping blades and a strong positive-off motor deliver a 97 percent leak-proof rating, keeping zones tightly controlled. An onboard LED display provides visual confirmation of damper position, simplifying commissioning and field diagnostics. Nylon bushings reduce operating noise, and the motor is UL listed and NEMA Class 2 certified.

This damper is suited for residential zoned forced-air systems where individual room or zone temperature control is required. It installs directly into rectangular duct runs as part of a multi-zone system. The quick-connecting terminal block eliminates wire nuts, reducing wiring time and the chance of connection errors during installation. The ND series design targets both initial installation speed and long-term reliability, making it appropriate for zoning retrofits and new construction alike. When paired with a compatible zoning control panel, the damper integrates into a full zone-management system.

Key Features

• Power-open/power-closed 3-wire motor operation with 17 inch-pounds of torque
• 97 percent leak-proof rating via overlapping blade design and positive-off motor
• Built-in LED display for visual damper position verification during checkout
• Manual gear release for manual override during service or commissioning
• Quick-connecting terminal block eliminates wire nuts for faster, cleaner wiring
• Nylon bushings for quieter operation and reduced long-term wear
• UL listed motor with NEMA Class 2 certification

Compatibility

Designed for use with the Ultra-Zone zoning system and compatible HVAC zone control panels. Fits standard 8-inch by 12-inch rectangular duct openings in residential and light-commercial forced-air systems.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with zoned forced-air systems and low-voltage control wiring. Disconnect power to the air handler and zoning control panel before wiring the damper. Follow the terminal block labeling for power-open and power-closed connections, and verify LED indicator status after restoring power to confirm correct operation. Consult local mechanical codes and the zoning system manufacturer wiring diagram before completing the installation.

Technical Specifications

• Duct Size: 8 inches x 12 inches
• Motor Torque: 17 inch-pounds
• Operation Type: Power open / power closed, 3-wire
• Leak Rating: 97 percent
• Motor Certification: UL listed, NEMA Class 2
• Length: 17 inches
• Width: 14 inches
• Height: 7 inches
• Weight: 5 pounds

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: END-8X12-MA15S